If you don't need hook ups and the its not too warm(I'm thinking Fall should be cool) I always stop in Bishop at the Casino. I know they charge 10 bucks now, I think, but its a nice grassy area and breakfast in the casino is not too awful(or you can hit Schatt's battery). I've filled my water at the parking area also before going up the hill, one less thing to do when you get to Mammoth.
1995 Vogue PrimaVista 37'
Humphrie, our Mini Schnauzer and Georgie, our Wire Haired Dachshund and new senior Cavaliers, Rosie and Potter. RIP our five Cavaliers(Elvis, Mollie, Cassie, Maggie and Rubie)