I have made
these four times so far
(with more to knit with a modified pattern) and am very pleased with the way they turned out. They are "smokers gloves", but I suppose they could be adapted for trigger finger mittens. If you would like any more info about the ways I have modified the pattern, I'd be glad to share!
Note about pattern - it calls for a size 5 dpn, but I found a size 6 and the largest size worked best for my hubby's big hands. I did make a pair using the smallest size and the size 5 and they fit me perfectly! I usually don't have to change my needle sizes on patterns, because it is usually right on gauge, but not so with this one.
BTW, I'm from Maine, too!!