Love those Bertrams,
I noticed the 3rd wheel on your trailer.
Your Alaska trawler should be seaworthy, comfortable and well found. I'd suggest three sources of heat. Like a Wabasto, a diesel heating stove like a Dickinson and a bus heater. The bus heater is limited to time w the engine running of course but they put out lots of heat.
Pick a boat that has enough room to be comfortable for longer periods of time. When the weather gets really bad this could be a life saving feature. If you've got "all the comforts of home" aboard you'll be less likely to go out when it's dangerous.
My avatar was taken in Duncan Canal. We just finished our Alaska time and live in Concrete Washington now. We kinda retired from Ak.
North Western Washington State USA