Ya. I ride a bike, but there where plenty of guys on 4x4 quads driving out in the lake. There are some sand bars that you can ride out into the water where there are some big sand islands haha. I got to a few. Kinda tough to ride a bike in 2 foot deep water though. The hills are pretty fun for drags and whatever.
Be careful before you fly over the top of any of them because sometimes, its a straight down 40 foot drop into the trees on the other side.!!!
But ya, definitely a cool place to ride. Some good jumps here and there. I rode on a standard knobby. Like a dunlop 756 or a Kenda or something, one of the soft compound silt/mud/sand/loose dirt tires and I was plenty fine. Infact, I don't recommend paddles out there... there is too many places where you ride on some hard trails or on a logging road to ride a paddle. I recommend just a soft compound knobby like the 756 or something.
The flats are pretty fun. I like wheelies, so the wet hard sand is good for that. Watch out for drift wood and stuff haha. When i was there the water was fairly low... I\m thinking I was there in june/july...
Take a camera if you like pics, there are some sweet shots of the dunes with mountains in the back and stuff.