Feathermerchant

But you have to get out of the truck to put the chocks behind the front wheels, right?
I think the 2X4 on the brake pedal (redneck line lock) is the better solution. And leave it in park.

fleming23

Something like this is a bit more "fancy" than a 2x4 wedged into your seat....

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Feathermerchant

If you have a drivers side electric seat, it would be even easier.

Boulevard

I used to have this problem with my 4X4 launching in things like sand and mud. Once the back wheels hit the sand/mud/water mixture the rear wheels sunk and the truck was all but stuck so I extended the trailer tung by 4 feet. Now my boat is completely floating and my back wheels are still on dry land. The new longer tongue also gave me room for a spare tire and a tool box.