We are in the design phase for a small coastal cottage in Downeast Maine climate zone 6. We are intending to build tight (<=1 ACH50, 2×6 walls with dense-packed cellulose with Zip sheathing as the primary air barrier and 3″ rockwool exterior continuous insulation with a rainscreen). The cottage is about 850 sq. ft. on one level and will be occupied by two people. There will be a great room with a vaulted ceiling (26 ft. x 16ft.) under a scissor truss with a 7:12 external and 5:12 internal pitch and with a 12″ energy heel. The remainder of the floor area will have an 8′ ceiling and conventional vented attic. We intend to have a vented roof in the scissor truss area insulated with blown-in cellulose to R60 (about 17″). To control humidity and IAQ, we intend to use a Lunos E2 HRV pair with one vent in the great room and one at the other end of the house in the flat ceiling area. The floorplan is mostly open. We also intend to have a Panasonic Whisper Green exhaust fan to control humidity in the bathroom and a vent hood fan (~250 cfm) to exhaust kitchen odors intermittently. The lot is heavily treed and we are in the shoreland zone where tree cutting is quite restricted. We would like to have two skylights, one on either side of the ridge, in the vaulted ceiling to provide additional natural lighting. 

I have designed the position of the skylights so that they are far enough up the roof that a ventilation channel should be open around the skylight box. This should hopefully allow for attic air circulation in the truss bay containing the skylights. Check out the attached picture.
My questions:
1) What happens on the inside of the skylight box up near the skylight itself when it gets very cold in the attic? This looks like an area that will likely have heavy condensation inside from any humidity left in the inside air because the skylight box is just separated from the vented attic by drywall above the cellulose.
2) Should the skylight box be insulated in the attic right to the roof deck with EPS or closed cell foam or something else?
3) Is this just a terrible idea and we should drop the idea of skylights?
4) Am I just being paranoid?