So have made many a trek Downeast. My family and I have spent many a mile on the Airline, eyah.
We couldn't go this summer because of COVID. Missed out on our favorite blueberry stand near Eddington, a good cup of chowder at the Red Barn in Augusta, our yearly pilgrimage to Reny's just for stuff, a stop at the Chicken Barn outside Ellsworth, dinner of Hellen's in Machias, the Lubec lighthouse and shoreline trail, stops at Tim Hortons, a quick trip to the Standpipe in Bangor to give my wife the willies and much more. I'll stomach a trip to Acadia but only if we pack a meal and do at least one hike around Jordan Pond
I'll say the summers in ME have gotten like the summers down by Philly; last year it was 90 degrees in Neils Harbor, NS, Canada. I'd get a slight kick watching my sister's family (Bangor) wilt when the temperatures got into the 80s. I miss ME but truth be told we've moved our primary vacations into the Canadian Maritimes (to escape the summer heat and partially to avoid giving all our tourist money when LaPage was governor, sorry, he was a jerk^2).
Enjoy it up there. You live in a special place (and I think you know that). And don't forget you have to go through mud season to get to spring (black fly) season.