Likewise, I don't know anything about Brunswick.
When I go to Bar Harbor I use 295 and get back on the Maine Turnpike at the Falmouth cutover. It is 10 miles shorter on 295 and 295 is a good road.
Interesting thing: Last year a motor home went zooming past me just before I got on 295 at Gardiner. I went down 295 at my usual easy pace (60 to 62mph) and just after I got back on 95 at the Falmouth crossover the same motorhome zoomed past me again, he must have been going 70mph at the least.
FWIW: The exit 25 plaza Southbound has a nice tree shaded picnic area. We always stop there for a picnic lunch on the way South from Bar Harbor.