Thanks for sharing your perspective.
I’m in Ontario, Canada. I have a 1940s era tin garage with a dirt floor. I’m sure there’s lots of mice who take refuge in there each winter. They are my main concern.
I plan on leaving hood up, with motion detector lights above it, with lots of traps, and a mouse deterrent machine. It emits a frequency that irritates their ears.

I put a vapour barrier down over the dirt floor, followed by a few old large area carpets.
I plan on going in to start the car and check my mouse traps every few days.

I think k I’ll leave the cover off it, so as to not provide darkness that rodents enjoy.

I will look for the highest test gas, like 94, to put in with the stabil.

So much to learn. Thank you everyone who’s chimed in with ideas.