Mosquitoes can carry diseases like West Nile Fever. You can use good repellent with DEET in it to keep on your person. Set up your camp site where there is a strong breeze or not close to water or ponds.
I spotted this really tiny butterfly with incredibly striking colors and markings in the foliage. I wish I knew what it was called! Seen in the Butterfly Conservatory at the American Museum of Natural History