Georgia Tech vs. USC, Help please :)

I’m an international student majoring in Aerospace engineering. I know that Georgia Tech is in the top spots of the rankings and USC is near cool places to do internships. Other than that they are very similar from what I can see in their websites. I think I can take a hard and rigorous program, but that doesnt mean that I would not like the possibility of an active social environment (In other words, I don’t mind keeping my head in the books all the time, but I want a college with the option of going out and have a good time once in a while).

I’m also interested in a double-major program, but is not a must. How easy is to get accepted in another department/school in any of these universities? Does an aerospace student even has the time to get another major? (serious question, not rhetorical)

Do you think getting an undergraduate degree from one of these universties in particular will facilitate the way for me to get in a prestigious graduate program (like MIT) later on?

Sadly, I could not apply for the merit scholarship at USC in time. So at first, I will be paying full out-of-state tuition in both schools. After one year/semester is easier to get merit based financial aid at USC? If you have any, what are some ways to pay for either of these colleges?

Also, if someone has information about private or independent scholarships for any of these universities or programs please let me know.

Please help, any advise or opinion you can give will help me a lot. Thank you, I appreciate it!