Both of my sons went to the extreme, they joined a Fraternity, the same one as it turned out. The older one had no other cadets in the house with him, the younger one had one cadet that joined the battalion live in the house for a couple years. My older son lived in the house for two years and then moved to an apartment with 3 of his Fraternity friends, the younger son stayed in the house all four years. If I remember correctly I don't think many of the cadets roomed together, I knew of just a few that did.
Now this is just my opinion and I think my sons shared it. They enjoyed living with non cadets, said it gave them an opportunity to be part of the school that was not ROTC. Realize that you will spend a lot of time with your fellow cadets, you may not want to live with them as well but that's something you'll decide.
It's true that you will be a ROTC cadet, but unlike an Academy or a SMC, you will be at a traditional university, take advantage of that. ROTC will keep you busy but not to busy that you can't be involved with school outside of ROTC. My younger son was a School Senator one year, on the Fraternity Executive Board one year, and President of the School IFC for a year, all of this outside of ROTC. Your only a college undergrad once, make the best of it, branch out, get involved, and take advantage of whatever you can. Manage your time and you can do this while still succeeding in ROTC. Both sons did well in ROTC and both branched Aviation. Stay focused and you can succeed in ROTC while fully enjoying your college experience.
Probably more information then you were asking for, hope some of it was helpful.
Just to add to this, Getting up early for PT was sometimes a challenge while living in the house because the rest of then did not have to get up so early, but they got used to it and found a good routine. AROTC-dad is right, when they did get up early they had the run of the place.