Additional info.
I spray the tent with Permethrin, too. The floor and the no-see-um netting. Bugs that crawl on it, will die.
Permethrin is toxic to cats, as well as fish and amphibians, so make sure to keep it away from those, too.
In addition, I’ve learned to bring along a Thermacell. They work well for chilling outside at night, but there are 2 other handy uses;
1) place the Thermacell near the door of the tent before entering. It chases the bugs away, so they don’t follow you into the tent (nothing more annoying than realizing there are mosquitoes inside your tent).
2) in the event that mosquitoes have already gotten inside the tent, the active ingredient in a Thermacell is Allethrin, and you can use it to hotbox the tent to kill the bugs in it. Allethrin is in the pyrethroid class of pesticides (like Permethrin). Bugs can sense it, and keep their distance from it, BUT if they can’t keep their distance from it, it can/will kill them.
If mosquitoes have gotten inside the tent, I turn the Thermacell on and place it in the tent, then completely close it up and let it hotbox for 10-15 minutes to kill the bugs inside. Then remove or turn off the Thermacell, and open the fly to air out with the no-see-um mesh closed.