Yep I went to the transfer orientation on the 28th and it was hell (especially because at one point I had to go up 4 flights of stairs after walking a distance in the heat).
We were usered from one place to another as they kept a really tight schedule. I can't imagine doing that for 3 days. Hopefully, as a freshman you will have more down time.
If you can get past the heat you will notice that the actual campus is really nice. A pleasant mix of modern and more classic architectural styles (modern is starting to dominate) set around manicured, grassy areas and tree lined lanes. I took pictures somewhere and people thought I was at an amusement park.
A tip: if you have to walk almost instantly after lunch (I did) eat lightly. I think the combination of food, heat , and walking created problems for the tummy and almost half the people in my group had grumbly tummys that could be heard in the silent hall where we were usered LOL.
Lucky you if it isn't that hot, bring lots of water and dress as lightly as possible if it is^^