'Not sure why maintenance workers would be an issue. I've played dozens of rounds as the first one on the course, and you give them a wide berth. I've only encountered one course that wouldn't allow me out because of the maintenance crew.
It depends on when a course does their setup. My home course has asked me to play slower when i am the opening tee time because of how they do the pins and stagger the maintenance
It's happened to me a few times where i would get to the back 9 and the pins were not in yet. Or there were crew members on the greens so you couldn't hit shots in
I typically play in 2 hours as a single . The head of our greens crew asked the starter to talk to me about playing slower LOL
I've run into plenty of workers cutting the greens, setting pins, or grooming bunkers. I wait for them to finish unless they wave me up. If they're cutting the fairways, I wait until they're out of range. 'Never had an issue or a close call. On a recent trip to Florida I chatted with a few of the workers, and found out that some of them were from the Chicago area, and we swapped a few stories.
One time I was out solo when the starter caught me on the 7th hole 45 minutes into the round. He apparently didn't realize I would be moving so quickly, and told me I couldn't proceed to the 10th tee until the 2 hour mark due to workers on the back nine. So, instead of a 2 hour round it turned into a three hour round as I waited an hour at the turn. Other than that, I've never been prevented from playing through the crews.