I can't speak since I'm currently living at home and going to school real close to me, but I don't know how far I'd have been able to travel either. Definitely not out of state, though, probably. I've never tried, but I don't think I would have taken well to it.
All your choices are relatively not too far from each other and in fact depending on where you live it might be real close by rail.
And I should mention that homesickness is something that nearly everyone, aspie or no, goes through. People like to play tough and act like it doesn't matter, but very few people don't get homesick moving away to college.