@gngrbluiz, I live in northern Maine, zone 4a, so I can sympathize with you! I have an unheated greenhouse that I use mainly for seedlings in the spring. Being unheated, it's pretty labor intensive because in the early Spring months I have to bring all the plants back to the house at night and then haul them out in the morning. I started over 1,000 seedlings last Spring, so it was busy!
For pollinator attracting perennial flowers and herbs, I have valerian (Valeriana officinalis), catnip, lemon balm, sweet william (officially a biennial but it usually acts like short-lived perennial)...hmm, there's probably more but now my mind is drawing a blank! I grow a lot of biennials and annuals too.
For a while I thought the season was too short to grow corn, but there are actually several short-season varieties that do well here. I grow 'Dorinny Sweet', which is an OP variety. You can get it from Baker Creek Heirloom Seeds (I'd attach a link, but I'm a fairly new member here and the site is still not allowing me to post links).
We have lots of bears here too, but I haven't had a problem with them in my gardens yet. A moose did eat all my broccoli, cauliflower and cabbage last year, though!
Anyway, hope some of that was helpful.
Joanna