this does not answer all of your questions, but perhaps one: Deep Woods Off (pump spray in green bottle). I swear by this, FOR ME, I do not know others' experience w/ it.
Since my 2007 bite, I started using it everytime we went to our (dog) hiking, swimming area, which is tick infested and where the deer were overpopulated until they killed 75% of them off. (at the time, the highest density in the whole country!) I have not yet had ONE tick that I was aware of while using Deep Woods.
Because of some uncertainties about deet, I thoroughly spray my shoes, hit my lower pant legs, and pump spray bits over various parts of my body, like arms, neckline and even in my hair, AND the rest of my clothing.
Everyone's chemistry is different, but this one works for me when I use it diligently. Worth a try, huh?
btw, I do not work for Deep Woods Off or any company affiliated w/ it. HA!
Bit 1972: Acute and chronic tonsillitis, UTI, miscarraige, appendicitis, hypoglycemia, chronic neck pain w/ crushed vertibrae, chronic severe back pain, mitral valve prolapse, depression, resolution?
Bit Mother's Day 2007: Lyme, Babesia microti, hypothyroidism, EBV, HHV6, Parvovirus B19, low adrenals &misc other hormones, depression, anxiety, more of the above.