My daughter and I ended up touring, driving by, or having very quick walk arounds at 20+ colleges. (Many of those happened because we were already in the area seeing other colleges.)
First, I STRONGLY advise against visiting a lot of reach colleges. Kids fall in love quickly, especially with reach schools. There are usually pretty obvious reasons why they are so popular, and once these colleges are seen, it sets unrealistic expectations for other colleges. It is most likely your child will end up at a match or safety school, and you should focus on those. I will certainly be doing this with my son. Wish I had done so with my daughter.
Second, I recommend three colleges a day, if possible, and if you aren’t turning it into a vacation. I know, most people say two a day. We were on a mission though, and college visits were no one’s idea of a holiday. We visited one first thing in the morning, one midday, one late afternoon. It worked often. Sometimes we could only tour two a day. We Avoided info sessions, as they were rarely useful, with a few exceptions. Sometimes it’s very difficult to skip the info session, but they are usually pretty boring and not that useful, especially when one parent starts monopolizing the QA.
Thirdly, even though we were lays on the move, we always made a point of stopping for a break/drink/food wherever we saw students congregating. We would sometimes leave tours (by saying we had to be on the road by a certain time) if they were heading to the gym, or other area of non-interest.
To answer your questions specifically, always make sure the AO will be open when you visit, so your kid can sign in. Some AOs will be closed for a short time in the summer. Yes, visits when students are in session are much more useful. My D eliminated many schools this way. Drive bys are not super useful, with a couple of exceptions, at least for us.
We planned routes once she had a reasonable list. We grouped geographically. All the colleges in the Bosotn are were done in two days, all the colleges in Pennsylvania also done in two days. Same for colleges in Upstate NY. Some colleges she wasn’t able to visit, and once accepted, she then visited one of them. I would never, persoanlly recommend paying for flights, etc…without planning to make a proper vacation out of it, especially to see a bunch of reach schools, but that is just my opinion.
Tours are best, for sure. There is no substitute for having a student give you all those juicy tidbits that you will not hear if you just walk around yourself. If you do your own tour, be sure to sign in at the AO.
Once acceptances come in, don’t feel obliged to rush back and revisit. Only revisit the serious contenders, or visit the ones you had been unable to visit before, if your child is really interested. They have a few weeks in whihc to cram in visits, and it’s during the time of AP exams, spring sports, etc…
Finally, I highly recommend either Hampton or best western because they have free wifi, usually free parking, and free breakfast innthe hotel. Saves a ton of time and money. (Don’t know if I am allowed to say those chains:-)