Go to Pala Casino and have a burger at their Cafe. Best burgers I have found - everything else at the cafe isn't that good... The burgers.. Especially the BBQ burger - devine!
Nessy is closed, I think. We drove by Saturday and it was shut up with no sign.
I actually looked it up on yelp yesterday after seeing it recommended here (wondering why a trailer was a good place to go get a burger, lol) and read that it was moved because of the 76 construction project. They are moving to the parking lot of that little store on the other side of the 15.
If I want a good hamburger I go to Ty's Burger House off of Mission & Coast Hwy. They are yummy and he offers a varity of burgers, plus he has sweet potato fries.