I know people who tow their boat and use a ramp to launch and remove their boat from lakes.
They all have HTRAC and had no problems.
I would say with FWD it would all depend on the angle of the ramp, condition of ramp and how wet it is
Hope someone on here uses their FWD for a boat.
4or7 Pin depends on weight of boat, and does your trailer have electric brakes?
The 4 pin can be changed to 7 pin by using connector, with controller and running a 12 V wire from
front bake to the same 4 pin built in connection.
There are instructions posted on here by others.