I used to be stationed up that way. There is a LL Bean store off Exit 187. It’s not a big storeAlso, a great place to eat is Las Palapas off of Exit 187 as well. If you’re into good Mexican food this place is the shit.
There is a place called MAINE Military Supply on the East end of I-395. I don’t remember directions once you get off of I-395, but your GPS will get you there w/ no issues. It’s a military surplus store w/ some decent deals on some things, but not so much on others. It’s worth the trip. They were supposed to install an indoor range, but I left MAINE before it opened.
Dysart’s Truck Stop serves a good meal as well. Their pancakes are pretty good but their coffee leaves a little to be desired.
Once you get down to the Portland, ME area there is a Cabela’s store. From I-95 it is Exit 43 or 45, but I can’t remember which one for sure. There is also a Famous Dave’s there as well. If you’ve never been i I highly recommend the brisket & jalapeño sausage. Famous Dave’s is my favorite commercial BBQ joint. The food is damn good & the beer is always cold. Prices are very reasonable.
If you have questions feel free to PM me.