I have never had a problem but every trip it’s in the back of my mind. Last year I left my truck in a small First Nations group of cottages for 8 days in northern Quebec. The community was neat and tidy, which eased my mind. There was no one there when I put in, but during the week I was out someone had been there, thankfully, no issues at all.
I have found the people here in Maine very trustworthy, I see people leave all sorts of gear out in the open while out fishing or hunting, no one seems worried. Then again, a lot of folks carry in Maine.