In Oregon, it's easy. Universal voting by mail. You can drop off your ballot at a box at numerous locations. Everybody got their ballots weeks ago. I've already voted. Easy. (AS VOTING SHOULD BE!!!!)
California has similar procedures. However, the Republican party constructed dozens of fake ballot boxes (labeled "official"), stuck them in various official-looking places, then collected and destroyed the ballots. There's a countermeasure available--you can track your ballot online. So you can find out if your ballot was in fact received. I'm not sure what the deadline would be for resubmitting your ballot. The fake ballot boxes and the destruction of ballots put in them were not the hijinks of some nutball fringe group, but rather, the deliberate actions of the official Republican party. I don't know why they think that these crimes would affect the vote in California.
If you're in a Republican state in particular, how hard have you found it to vote? What hoops did you have to jump through? Was it easy to register? How enthusiastic have the powers that be been in encouraging people to vote? (I would imagine in Republican states, not enthusiastic at all.) What's your experience?