Tell him it is a beach cat....... Not a boat ramp cat.
Do you have any local laws with regards to launching boats. Would the ranger have the same problem if it was a canoe or a wind surfer.
I would understand he would have a problem if you were backing your boat into the water, but if you are sliding it off the trailer and wheeling it into down to the water once rigged....... Then I can not see the logic.
I do back my boat down there but not into the water. I never get closer than about 40 yard to the water with my car, from there it is cattrax all the way.
I have seen alot of people back PWC's in there and never had anything said to them. I am not sure if it was just bad luck that day or if the ranger had something against sailboats.
Also I would understand if there were fee's at the boat ramps but they are all free.