Re: trailor tongue longer ?
One of the problems here is that a lot of the ramps are either steep or sandy, that combined with the angle that the boat is on the trailer while sitting on a steep ramp, it decreases the tongue weight quite a bit. I backed down one ramp with my old truck, a full size 4x2 p/u, and noticed the rear end raise up as soon as the boat was heading down hill on the ramp. On level ground that boat would squat my truck a bit, but on the ramp with the boat trailer hanging down hill the weight of the outboard seemed to offset the tongue weight.
I didn't even try to launch there, I pulled out with some difficulty and went elsewhere.
That boat had everything in the rear and center, the angle of the steep ramp combined with the 40 gallons of fuel dead center, shifted the weight to the rear when on the ramp. I got it out of there, but barely with lots of side sliding and wheel spin, and I had at least 1000 lbs int he bed. That truck had good tire, a posi rear, and plenty of power, but the boat outweighed the truck by about 1100 lbs.
My current boat is lighter, but so is my truck, when fuel prices jumped up I moved towards a lighter truck and boat. With the light truck, I also tend to put all of my boats on oversized or at least longer trailers. Some of the places I plan to launch my bass boat have nothing by clamshell paved ramps or just dirt. They are gradual, but many drop off into deep water rather quick too. So the tongue has to be long and the wheels set forward to allow the boat to float before the wheel drop off the edge. What I did before there was to add a weight box to the tongue, it allowed me to tow without the sway and keep the axle forward. My tongue on that trailer is about 6' out in front of the boat and the bunks extend 28" past the frame. The axle is about 1/3 of the way back in relation to the boat. We can only run electric motors here, so there's no outboard on that boat, only a trolling motor, and I hang that once in the water or ready to launch. I add as much as 100 lbs to the tongue if I am towing on the highway, if not the tongue is too light and the trailer will sway.
I can put that boat in without even getting my back wheels wet.