This is a good link for more information (an interview of a mother and daughter witnesses):
https://www.wmtw.com/article/lewiston-bowling-alley-shooting-maine-just-in-time/45647702
He started at the bowling alley and then drove South very quickly to the bar. Then he traveled further South to Lisbon, Maine. Either he picked up another car there, or possibly had a boat. There are a lot of small bodies of water in those parts.
Here is the bowling alley:
Here is the bar:
It is a big bar by central Maine standards. There must be 20 pool tables there.
or possibly had a boat.
My guns were in my boat, too….