The Paris' buffet. I recommend it to EVERYBODY! 5 star buffet! Breakfast and dinner (although I really love their breakfast.) Inexpensive and amazing food quality. Made to order eggs, omletes, crepes (chocolate banana, carmel apple, just to name a few) several types of sauage and potatoes, belgian waffles, pancakes, yummy smoked trout....Oh man, now I gotta go back!!!! Dinner's very good too, Prime rib, rack of lamb, crab legs, shrimp, kabobs...Bit more expensive than breakfast but worth every penny. Yummy, Yummy desserts.
As for shows, if you can swing O (cirque de soleil) it's phenomenal..Pricey and hard to get tickets for, but one of the best there is there.
A good show with dinner is at Excalibur. It's a jousting tournament (Think Medival Times, Vegas style) The food was pretty good there as well. Not sure if Mama Mia (I think that's right, is still there, but that's supposed to be a good dinner show too)
If you like seafood, the Rio has a great seafood buffet. it's HUGE!
The Veneitian has the Grand Lux Cafe...which is operated by the Cheesecake Factory..Need I say more? Don't let the word Cafe fool you. They have a decent breakfast as well, fabulous dinner and desserts. There's also a Cheesecake Factory there as well (Ceaser's Forum Shops) Yummy, but you'll find cheaper meals elsewhere and the food will be just as good.
As for the heat, as someone who was born and raised there..I'd take that dry heat of this nasty humidity any day of the week....But it WILL be hot...VERY, VERY hot in August...Depending on what type of climate you're used to, it coud be a shock to your system...be sure you're very hydrated before you even get there.
Have fun! I'm jealous. aven't been "home" in over 2 years!