I agree with most of what you said but Alaska 100% has spiders.No spiders in Alaska! Don't forget how many trips it will take to pack a moose out. If hunting Alaska you also have to bring out the ribs. If you are getting dropped off it definitely would be worth having a tent with room in case you get weathered in for several days. To begin with I'd start off with a 3 or 4 season tent that can withstand hurricane wind and lots of rain! Next, a tent large enough for most of your gear, and possibly a vestibule to cook so it's not outside in the weather and bears.
Permethrin works great. Since it doesn't repel them, it kills them. I spray it on everything I own.Don't know about the dates of your moose hunt. In many years of chasing moose and caribou in Alaska, I've never wished for a bivy or had a bug problem big enough to bother me. I use a tipi for all my hunts and I pin it tight to the ground. It also has a sod flap which I 'rock' or otherwise flatten down.
This might sound a bit odd: Before dealing with a little bivy, I would bring some permethrin and spray the perimeter of my shelter...and maybe the ground near my bag. Permethrin adheres or persists very well and resists washing off, even in a washing machine. All forms of 6 and 8 legged pests hate the stuff.
Holy mother of god that Centipede is giant! Thats some shit outta Indiana Jones! No way I would be sleeping with out a bug bivy. whewIf not in a full tent I use a lightweight bivy for bugs down here in the SW desert. The freaking giant centipedes bug me the most. I've seen 5 so far this year.
I have an MLD with full face mesh and many will recommend a Borah as well, either in DCF are 5oz or so. Don't know about the Borah but the MLD has a sewn loop for a stretch cord to tie it off to a tarp or tree, etc... to hold the bivy off your face.
No spiders in Alaska! Don't forget how many trips it will take to pack a moose out. If hunting Alaska you also have to bring out the ribs. If you are getting dropped off it definitely would be worth having a tent with room in case you get weathered in for several days. To begin with I'd start off with a 3 or 4 season tent that can withstand hurricane wind and lots of rain! Next, a tent large enough for most of your gear, and possibly a vestibule to cook so it's not outside in the weather and bears.