Our class just finished and had guys staying in the hotels on Meridian as well as Anatole. Never heard of a rental car you can use. I strongly suggest taking your own car. At most, if not all the hotels, the conference room is free to rent and a great place to study.
I second the fact that studying together is only really useful once you start tabletops to practice the fundamentals. Once you get to the sim, it becomes pretty useless pretty quickly unless you have classmates that still need to practice the basics. You’re better off running questions/thoughts by each other and your instructors at that point. I will say though, that getting together after each block test in academics and coming up with a list of the questions/answers to study is very useful when it comes time for the comprehensive test. Do not lose points in academics for lack of studying.
Lastly, no matter how bleak things may seem, if you want this career —NEVER Give Up!