I like outdoor over indoor every time. There is a little club range here with a 300-yard line and steel targets at different distances. Nothing beats hearing that ping echo through the hills. Indoors is fine for winter, but I start itching to get outside once the weather breaks.
I've hit a few in Maine personally, I dig outdoor ranges for the space and natural feel, but indoor ones are great when it's cold. What I love most is well-maintained facilities and chill staff.