Man has no natural predators in the Maine woods
My co-worker is an avid deer hunter and frequently hunts with his dad.
During their pre-season scouting they put up thermal sensor cameras in locations where they are considering putting their tree stands.
About two months ago, his dad went out after work by himself to check the camera and as dusk closed in started to hear the yoots. Within 10 min. or so, he found himself in the middle of at least 20, if not more, yoots howling it up all around him. He couldn't see a one and yet could tell they were close.
Poor guy almost had a heart attack running out of the woods to his truck, as he was unarmed.
My co-worker says he never goes in the woods without some type of firearm and had told his dad that many times. His dad now agrees.
There are also black bear, but they are more afraid of you than you are them.
And despite what you read on the net and what the "official" answer is by the DNR, there are mountain lions in both Maine and NH. The DNR doessn't want any proof of it, because the don't want to have to regulate them as a protected species. If they officially don't exist in Maine, then they don't have to do anything.
Maine is an open carry state. I'd get a holster to carry a side arm in the open.
If your traipsin around with a rifle and don't have a hunting liscence you might have to do some tap dancing explaining yourself to a forrest ranger, but doubt you'd really have a problem.
Don't carry concealed or carry an uncased handgun in your car unless you have either a Maine non-res. ccw or make sure your states ccw has reciprocity with Maine.
Call up the Maine State Police if you have any questions. They've always been very helpfull to me and will give you the straight scoop.
Under NO circumstances is it ever legal to have a loaded long gun in your vehicle in Maine. You must unload your rifle or shotgun prior to putting it in your car.
Even though many Mass Holes have infiltrated the south in search of affordable housing and have turned both states into blue clollumn. They are still sportsman's states as far as guns go. Both ME and NH have very friendly gun laws...well codified in their respective state constitutions (see my sig. line).
Don't forget the #1 threat to your health and safety while up there in the spring............mosquitos and black flies!
Deep woods off with deet is your friend.