[Symbiote]

7. Put on a bus on the busiest weekend, from a place with adequate parking, like a nearby town.

I visited Gatineau Park (just north of Ottawa) this way. I think the bus was free. It also meant we didn't need to plan a round-trip hike.

[timmaah]

Zion Canyon is already off limits to personal vehicles much of the year. Busses have been running for the last 18 years.

In the peak season there can be a multi hour wait and the nearby town is also constrained by the canyon and there is no more places to put in parking lots.

I don't really think there is an option besides limiting daily visitors.