Can I keep my bed assignments when I copy a season?

Yes, and your beds come along in one click. In the Game Plan, open Actions, then Duplicate season, and tick Include location assignments: each planting keeps its block and beds in the new season.

Leave it off when you rotate your crops. The plantings then wait under Unassigned on the new season’s Crop Map, where the crop families history of each bed helps you place them.

The steps are in Duplicate your season and Assign plantings to beds.