There are definitely places where the tarp thing might not work so good on account of insects. Virginia saltmarshes in summer is an example I can attest to.

Fire ant country? Mangrove swamps? Fire ants sound like fun.

Actually, since switching to mostly tarp use a few years ago, I've wimped out when doing the alpine meadow mosquito swamp thing, and switched back in those instances to either a bivvy tent or one of those jobs with the netting sewn on the front.

Was perhaps unnecessary, given that my "tarps" have doors. A question I haven't resolved through experience or inquiry.