chiggers and ticks hardly bother me anymore. This time of year I dont' go in the woods without slipping on long sleeved pants that are sprayed good with permethrin.
Mosquitoes are different, I never have any deet or other bug spray like that so I will get eaten by mosquitoes if they are bad. Not so much a problem because the bites only swell up for a little while and dont hardly itch. I only hate the feeling of a mosquito poking its snout into me, I cant stand that, but I can see them and I can squash them unlike chiggers and ticks. Mosquito bites go away but chiggers and ticks last for days.
If I get poison ivy, most of the time I know where it's from because I saw it when I ran into it. I try to avoid it but sometimes it's in the way and I don't care.