OR the Parks Dept should be charging MORE $ for the services and access so the actual USERS pay 100% of the costs instead of state funds paying to fill the gap.
Supply and Demand- increase the rates! And the increased rates will reduce the # of [poor]users. Econ 101.

Remember, in 2010 Gov Otter considered shutting the Parks Dept down dealing with incredible budget cuts and the GOP seemed happy to drop the Parks Dept like a hot potato.

On the other hand, IF the Parks own “philosophy” is true, they should continue to advertise with tax dollars as those dollars bring in MORE dollars in the long run.
Full? Build more (expand) parks.

From 2018:
https://parksandrecreation.idaho.gov/news/idaho-state-parks-contribute-millions-idaho%E2%80%99s-economy

Seems like the Dept is contradicting itself; or more likely, just doesn’t know what to do.
Current Parks Director for last 5 years, is David Langhorst- an appointee and former Dist 16 legislator.

The annual fee was previously $30/vehicle. This fee was available for purchase from ITD, but the $$ goes to state Parks and Rec Dept. Kangas is correct, the Idaho Lege took away most or all general fund support for parks. So the Parks Director at the time (Nancy Merrill, former Mayor of Eagle) decided to drop the sticker price to $10, hoping more auto owners would purchase stickers, which would raise more $$ for Parks and Rec. That scenario did occur.

So don’t blame ITD… that agency is merely acting as an agent for Parks and Recreation, and making purchase of the sticker convenient for those who own vehicles. the fee is totally voluntary.