I'm not deaf yet but I traveled with plenty hard of hearing folks, you'll wanna get one of these aide brushes and a dry box of you don't have em already. I couldn't find a picture of an old dry box (they're all like electric USB things now and I do not know anything about em) but they're small rounded airtight boxes lined with a thick rubber and a small aluminum tube poking out the side, you put your aides inside clamp it shut and then suck the remaining air out through the tube which has an seal on the back that'll clamp closed when the air is gone.
I know otolaryngology offices have pamphlets on how to care for your aides if you have a particular type of job that may harm them, could be useful seeing if there's one for outdoor care specifically. Sorry I don't have more info for ya bro I should've gone into ent instead of general practice but hindsight is always 20/20 lol
be safe have fun 🍀