Well, here is the skinny on beach driving. 4 high or 4 low is not important. I grew up driving at the Pismo Dunes all the time. I used to bounce around in 2 wheel drive all the time. Here is the only trick you need to know. Air down your tires, and not to 30 psi or 20 psi, but all the way down to at least 10 psi. You will have a nice bulge at the bottom of your tire and you will float well. Stay of the brakes unless you need them. You will drive around no problem at 10lbs. If you are using 16.5" rims be careful not to peal a bead, no bead locks on those wheels. I have had no issues driving down to 8 psi on 16.5" rims. I could storm competition him and go all the way up in 2 wheel drive with nice low tire pressure, there was nearly no where I couldn't go. If you find yourself getting stuck, throw it in 4 wheel drive. Bring a shovel, can of ether, and small cigarette lighter compressor being a rookie. have fun, I guarantee you will.