If you were planning a hunt for moose in an area known to have loads of mosquitoes, what repellent would you use?
Tier approach. If it's not too hot, I like a flannel or wool shirt for thickness, then a mesh bug jacket with a hood over the top. And mittens ... bastards will get in the eddy in the air behind my hands, get onto the back edge of my hand, and bit the [bleep] out of me. Haven't had much trouble with them biting through jeans. If they are real bad, I will wear a "bug bucket" inside the hood of the bug jacket to make a little more space so they can't reach me through the mesh as easily. Generally use permethrin on the bug jacked, hood, and mittens. I carry a small bottle of DEET in case of other stuff failing .... sort of like duct tape except for getting rid of bugs. Finally, in deep summer when the bugs are the worst, I carry a thermacell to clip to the front of my shirt when I'm eating and to lean against one pants leg to create a "smoke zone" so I can drop trou to crap without having my balls chewed off.
(I'm sure you needed to know that, right?)
The bug jacket / "bucket" / mittens probably total around 4 ounces, not a big deal and they work pretty well.
A buddy I hunt / hike with just uses DEET-based repellent and mosquito coils. He uses the coils like I use the thermacell. I told him if he got burned, he's on his own.
Tom