from "nessmuk's" book Woodcraft published in 1920 he gives his favorite bug repellent that he in turn found in a 1883 "forest and stream" magazine.
3 Oz of pine tar
2 Oz castor oil
1 Oz pennyroyal oil
simmer over a low fire and bottle up.he said one ounce of this lasted all summer.he also said he never washed on a seven week camping trip.
other remedy's i found in "the way of the woods" by Edward Breck from 1908 added creosote,camphor,citronella and something called carbolated vaseline. it's noted that the tar can be omitted for the lady's use.