A couple of my local authority colleagues did this regularly. They regarded it as a day off with extra pay. They weren’t the busiest so didn’t get behind with their relatively small workload. I never volunteered - I was busy enough in the office. Sounds like you had a good time - I pity those who (wo)man the polling station at our village hall - it has a loo and a small kitchen but there are no other facilities for miles. However once the polling station was the parish Church which only has a loo. And as a small village with few residents, it must make for an incredibly boring day.
Live over 225 miles away from family
don't have a problem with under 16's having free bus travel,BUT


