Poop board is key to only doing a full change out once or twice a year......I do the same with shavings.
Sounds like you have a great space to population ratio, that helps a ton too.
Thanks for adding the details, always important when comparing techniques.
This guy uses hemp bedding and has written about it.
https://www.backyardchickens.com/threads/hemp-bedding.929111/
..and composting with it.
https://www.backyardchickens.com/threads/hot-composting-with-chicken-bedding-and-garden-waste.900637/
Personally...it's sounds like really, really, really...