I hear you on those wasps, seems like they are there every year and can't get rid of them, luckily for me they are hybernating during deer season, but a few still seem to startle me every season. I can't tell where you hunt out of, but I've hunted out of an insulated blind before with a small heater in there. Thought it was sealed pretty good. Turned onthe heater one day when it was super cold out and the knats came from everywhere, had to leave my stand. I'd put some carpet in a few padded places to rest your bow/gun and you should be fine.In my experience, insulation gives a place for thebugs to hide anddoesn't help much in the winter,the encloser itself seems to hide most of the sound with a good piece of carpet down.That's just me though, may be different for others.The blinds I use are pretty similar to you. Plywoods walls, 2x4's, 2x6's and such. They sure pay off when the wind is blowing 30 mph and the snow is coming down! That is quitea nice blind, great construction and hopefully it will pay off come fall!