Cannot answer that question without knowing how cold it gets there but I am assuming the answer is no.
The heater is risky, what if the power goes out?
At a minimum you will need to drain the engine and exhaust after every outing, however some water is left behind as well as in PS cooler and hose to the outdrive.
How many times do you think you'll use it? If not many consider winterizing the engine and nit use it.
Risk vs a new engine
1997 2400 SCR
5.7 Vortec / Bravo 2