Get a 3/4 ton or bigger and 4wd. Boat ramps get slick.
Yep. My boat and trailer are probably that heavy. I've had all 4 (or maybe 3, since the front dif is open) wheels on my F250 slide on the ramp when pulling out in 4Low.
Your current truck won't have near enough traction coming up the ramp. Maybe if you added another 1/2 ton in the bed it might work, but I wouldn't count on it.