It's not much of a risk, IMHO. I think I told you about my experience voting in the primary. 5-10 minutes in a large, well-ventilated room with a handful of masked people. My contact with the voting judge was literally a matter of seconds as I gave my name and picked up my ballot. I filled out the ballot at a little booth with nobody within 20 feet of me, walked over and inserted it into the tabulator, and walked out the exit door (which was standing open to let fresh air in).

YMMV. And probably does, considering the state you live in. Voting in Minnesota is quick and easy. The precincts are very small, so the polling places are not crowded (at least at the time of day I usually go) and the process is streamlined.

Caucuses, on the other hand, would be a death trap in times of pandemic. I do usually attend my precinct caucus, even in off years when not much is going on. But probably not next spring unless things get a lot better really fast.