RV living and registering child for 1st grade.

Prior to retirement, I was the Transportation Director for a Florida School System. We picked up children at RV parks, motels, etc. Parents would go to the nearest school to register. The school would call our office to get the assigned bus route and we were ready to pick up the kids the next day, or drop them off after school that day if they wanted us to do so.
Not sure about other places, but my experience has been that the school want to teach kids.
Good luck.