The step beyond needing a head net is needing gloves which we experienced once, on a family trip here on the Kenai during a summer universally acknowledged as the worst in the last quarter century and second worst since the 1950s by homesteaders.
In the 1980’s, we got various army-surplus head nets in at the backpacking store. The ones from the British Army had a stitched slit (like a button hole) for one’s pipe stem.
I like a collared shirt (for many reasons, including) neck protection and something to tuck the head net under. For me, it’s always a 100% nylon fishing shirt with generous chest pockets.
I once did a side-by-side (well, leg-to-leg) comparison of lemon eucalyptus repellent versus DEET and the lemon eucalyptus did distinctly better.
When I survey people’s backs, dark clothing gets 4-6 times as many mosquitos as light colors.