Never stayed at the Casino, but I looked at their dock faciltiy once. Not bad. I played cards at the Casino once. It was ok.
Its not a major destination spot, but it might be a fun overnighter with the family. They have a few things to do besides gamble and fish. If I recall there is a big indoor waterslide right as you come in, and a small video arcade off in one of the secondary buildings.
That stretch of river was know for numbers of smallmouth long before Havasu turned on for smallmouth like it has.
No, you can't get to Havasu from there by boat. LOL. Well if you ride in the boat while somebody trailers it up to Havasu Springs maybe.