The top of the hull looks like the Biesemeyer that I just bought but the bottom is definately a lot different, "hull comes in too deep" just like you said.
Senator's Wash is about 20 or so miles north of Yuma Arizona but it's still in California. It's a great place to go if you have kids and don't want to take them to a live porno shoot, if you want to run around in circles all day dragging tubes, skier's, wakeboarder's, etc... if you like to camp ON the water for $5 a day, and if you like to swim in the water (because it's allowed). The nearest gas station and store is about 15 minutes away.
It would be a bad place to go if you want hook-ups for a motorhome and/or if you want a paved roads, green grass, picnic tables, running water, a bar, a restaraunt, constricting ridiculous rules, police/security patrols all over the place, and similar stuff that resorts offer.