From Caribou- Route 89 East. From North or South- U.S. Route 1. From Canada- 375 in New Brunswick goes to 229 in U.S. and straight into Limestone.
There is never any heavy traffic, not even moderate traffic. So using a car is by far the easiest way to go. The central part of Limestone is very small, walking around town is very easy.
Loring Air Force Base- It has a museum which can tell you about most of the activities that happened at the base. It is now mostly abandoned, with a Loring Job Corp Center, and a Humvee rebuild center. It was featured in the movie WarGames.
High School Sports Game- The Limestone Eagles have games in all kinds of sports. Soccer from August to October, Basketball from November to January, and Baseball and Track whenever the snow melts. There is a schedule at the school website, 
Trafton Lake-This campground hosts the 4th of July fireworks along with other events
Spud Speedway-It's a 1/3 mile paved circle race track. Technically it's in Caribou, but it's right outside of Loring. It cost $5 to get a seat in the main grandstands, but for $10 you can get into the pits. There are food stands in both spots. 
The closest nightlife is over the border in Moncton.