I live in Maine.
I live in the Southern half of Maine, though about 3 hours North of Portland.
There are many tourist-focused restaurants [mostly in the tiny tourist towns along the coast] that are only open in Summer.
Right now all the rest of the restaurants and bars are open.
We just had a big storm blow through, it took out the power grid for most of the state. Most townships have power back now, I think we only have around 2,000 homes still without power this week.
We are seeing a very mild winter so far. We should normally have at least a foot of snow blanket right now here on my farm, but it is too warm for snow.
The roads are clear, everyone is open. I hope you enjoy your trip.