I don’t know of any published guides. I know they are all way faster than I was, lol. Plus a lot of that stuff is going to depend on what the defensive scheme asks a particular guy to do - Mikes are not Stacks are not Wills, etc. I know for my son, there was great variability in the skills sought by different offenses, which we kind of gleaned from watching what film was available. I think you were wise to look at the rosters for physical stats. Another thing you can do is pull up some hudl tape on the recent recruits. That should give you some idea of the speed/quickness of kids coming in, especially if you can find some recruits who played against teams your son is familiar with. We were fortunate in that my son played a lot of games against teams that sent kids to the Ivy/Patriot/Service Academy world, and I know I watched a lot of hudl tape on kids from the previous one or two recruiting classes when my son was going through the process. If you have a good understanding of the game, you can get a bit of a sense for what particular schools are looking for.
As far as camps, I personally lean away from camps like NE Elite, particularly for a kid who is already on the D3 radar. I think the primary purpose of the big aggregator camps is to get noticed, and to get some sense as to what the appropriate level may be. Not sure that is the best use of time for kids going into senior year who are already talking to coaches. Especially if you have to travel a fair distance to it. That said, I know there are several people here who have found NE Elite to be worthwhile, but for my money and recognizing that there are finite camps your son can do before his performance will suffer, I think the individual school camps are the way to go. Fewer kids so more reps, running the school’s drills so a better chance to highlight traits important at the school, with the position coach doing the hands on stuff. I just think it gives the coach a much better read on a kid (and as importantly, the player/parent on the coach)
I don’t know how long you plan on being out east, but I would urge you not to overload on camps. When I did the circuit with my son, we did three camps in six days on one trip (with a recovery day between each camp) and then a separate trip to another. I saw a lot of kids who were on the same circuit as my son who tried to do camps back to back, and it was obvious their performance suffered after three or four camps without enough rest. I remember one kid who I felt terrible for. I met his dad the morning of the Princeton camp, which was the first camp for both our kids. They were coming from Texas and did five camps in six days. The kid looked great at Princeton, and gave my son some trouble in pass pro (my son is still half convinced that he only got an offer at Princeton because he accidentally/on purpose tripped that kid to keep from getting beat while Coach Surace was watching). At the end of the week at the Dartmouth camp, my son tossed him around like a rag doll. The kid just had no gas left in the tank. You need to remember that each camp is an audition, and do what you can to make sure your son is at his best that day.
Making some Ivy camps and D3 camps might be tough on one trip, since if I remember correctly the NESCAC camps (which is where I assume you are pointing on the east coast for D3) were all quite a bit later in the summer after the Ivy camps. So scheduling might be an issue. If it is, and you and your son think the Ivy is a legitimate target, then I would focus on the Ivy camps where your son is getting consistent, personal interest by the late spring/early summer. See who comes out to see him at school during the contact days this semester, who is sending him personal e mails, who invites him to junior days, etc. To give you an idea, when my son picked his camps, the criteria we used was that he would only camp at a school that he had visited either on a junior day or a separate visit, and the coach had been in to see him once during the contact period during junior spring, and he was getting at least weekly personal contact (mostly personal e mails at that time). Then in late May we plotted out the best week to hit his chosen schools. To be honest, this was probably overly cautious of a criteria, because one school that just barely made his cut turned out to be where he has spent the last three years. So much depends on the personality of the recruiting coach, the calendar, the high school, etc, etc. The point I think is to pick the schools which stand out from the herd.
Then I would get in touch with the D3 recruiting/position coach at the schools he is interested in at that level, and find out if and when they will be at that particular camp. Basically, I am not sure it does a lot of good for the Williams quarterback coach to be at Harvard’s camp when your son is there as a linebacker. I would rather schedule it so the LB coach or DC will be there, if possible. Make sense?
On the other hand, if it really looks like he is a D3 kid with maybe an outside shot at an Ivy, then I would probably set the schedule using similar criteria for his chosen D3 schools, and see if there was maybe a way to tack an Ivy camp or 2 on to the trip.
Hope that helps, and any other questions, sing out.