I was just in Vegas in May and it was really fun! I would for sure recommend seeing the Grand Canyon, that was one of my favorite things I saw on my trip! I stayed at the Wynn and I Loved it! There is enough in that hotel to keep you busy for days, and it has a Ferrari dealership inside so that was pretty cool. cirque du soleil is really cool, I'm not typically into shows like that but the performance I saw was amazing, I think it was called mystere. But definintly check out the different hotels, ceasars palace and the forum shops are really cool, and there are tons of shops in the different hotels as well as on the strip. I can't help you much about the good casinos, since I wasn't able to go since I'm under 21
but I'm sure someone else will chime in. Have fun on your trip!