So that's what I've been doing until last week when I drove by myself to the beach. There was no way I was going to risk ruining my hearing aids by exposing them to the sand and water. But I couldn't very well leave them in the car because heat would wreck them too. The best option was to leave them at home.
It felt very freeing to drive without them. The road noise on the highway didn't bother me the way it does when I wear my hearing aids. I didn't have any passengers so there wasn't any strain to participate in conversation. But still I wondered if I were doing the right thing.
Yesterday I did a little research online and found out that in Illinois restriction F on a driver's license simply requires me to have two outside mirrors according to this state government website. There is no mention of having to wear hearing aids while driving. That was a huge relief to me. Now I feel comfortable about using my own judgment about whether or not to wear my hearing aids.