We have been going to Sam's Town for years and it got much better in the last couple of years with better restaurants and a revised floor layout. The slots pay pretty well, and the atmosphere is quite relaxed. It is pretty far off of the beaten path, and it is popular with the locals. It is not "Trendy", is old school comfy.
If you are traveling in an RV, check out the park next door. I have heard it is very convenient and reasonably priced.