Maureen all you have to do is fog the motor, put stabilizer in the tank and change the lower unit fluid. Make sure that you lower the motor to let all the water run out. No need to remove motor from boat, maybe just cover it.
As far as the hitch goes I'm kinda of confused maybe pics will clear up the problem you have.
Sorry Lew beat me to it, and he's right is real easy to do plus it will save ya some money