I'd seggest you back the boat / tailee up, carefully unlaod the boat into the water by getting wet

Get you crew to stand in the water holding your boat getting wet while you move the trailer / car out of the way.

Come back to the water, put the sails up while standing in the water thus getting wet

Go sailing which (unless) there is very little wind should ersult in you getting wet

Did I mention you might get wet...

It is part of the fun