don't trip man. i just finished my first year at UCLA. several things you must consider and know.
1. LA isn't as hot as you think. im from the bay area and i thougth LA is suppose to be hotter, but it aint, its actually a little cooler. theres always a nice breeze to set off the heat and occasional overcast as well 2. what type of person are you? sproul is very fun and is the typical place for first years to live. yes it is sorta cramped, but its not that bad. its fun and social and you will meet lots of people youll like. it is slightly dirty in my opinion and i dont like community baths. so if you dont mind walking down the hall everytime you wanna shower or crap, then its all good.
3. sproul is cheaper. sproul houses mostly 1st and 2nd years. theres two parts, the north and south, and each has ONE elevator that is slow as hell. sproul is more centrally located closer to the other residences and campus. NO A/C, but its not hot in the rooms...really, unless you intentionally turn on the heat, youre cool. opening the windows gives you enough of a breeze, especially if youre on the higher floors.
4. i dont know much about hilgrad, but i think its pretty much for like "special" situations i.e. students with children, handicapped..etc. it is rather far away from the middle of campus where class is and it is way UP the hill. im sure the houses are nice though, just like any other normal apartment loaded with the extras. if you plan on eating in the dining halls, hilgard is way way far from that.
bottom line, if i wereyou, id choose sproul, it wouldnt be my first choice, but it is better than hilgard.
IM me if you have other questions "ungalicious"