Both Tours and especially Pros are super fun, I recommend going to both of you can. There are about 20 - 25 PASR / AZBR folks signed up so far.
Hotel wise, you want to stay on the north side of town, look for references related the the speedway. However, I found that rates were pretty high and availability seemed a little tight, so book now if you can and cancel later if you need to. The site isn’t really that far from downtown if that’s of interest to you.
Regarding flying home, if you can get a cheap flight and cheap parking, go for it. Personally, I found Vegas to be an easy drive and not worth the expense of flying and I’m not sure how much time you’d save when you add in travel to and from the airport plus leaving time to check in.