I second the recommendation of 4 wheel drive. Even using compound low 4WD is a great advantage. My Durango with a 5.9 L (360 cu. in.) V-8 can pull not only my CD-22, but my 8,500 lb. 265 Sea Ray Sedan Bridge out on a steep blacktop ramp overlaid with sand and up a 1/4 mile ramp (end of season low water)!
Another caution: Know where the end of the paved ramp is! Dropping your trailer wheels and/or your tow vehicle's wheels off the end of the ramp and into soft mud is to be avoided! Especially when the drop-off is a foot or more and the tide is coming in! Don't ask me how I know, but some day I'll relate the story of how my nearly new Volvo 142 Semi-Submersible and I went for a dip at the Richmond, Ca., ramp one night with a nearly 8 ft. tidal inflow. Also counts as a nice experiment in the electrolysis of a wiring harness, tail lights, etc.! Many ramps do not have the end of the pavement marked! :cry
Joe. :teeth :thup