My friends have a 24' Sea Chaser and a GMC Sierra, rear wheel drive. Their closest boat ramp is Bayou Texar but they have tried several others, and everytime the truck spins like crazy trying to get the boat up the ramp. They have piled people in the back of the truck to no avail, and tires are good. Are there any boat ramps which are more forgiving? Otherwise, what could they do except buy a new vehicle?