At what stage of California's COVID-19 reopening is travel for tourism permitted?

This question is about what is permitted by health orders (rather than what is prudent based on personal risk assessment).

I understand there are four reopening stages defined statewide, but each county gets approval to progress through the stages at an appropriate pace based on local conditions. What stage does a given county have to reach for leisure travel/tourism to be permitted there? I would think this answer would be uniform across California, even though different counties are in different stages at a given time.

Per the state page, stage 3 allows "Travel for permissible activities, such as healthcare, food, stages 1-3 work, and [local shopping or other activities] related to open sectors." The phrase in brackets is my correction of mangled text based on a similar phrase used in stage 2. It is unclear to me whether "activities related to open sectors" in stage 3 includes tourism.

One news article says, "Monterey County...will welcome the return of tourism on June 12, when it enters into Stage 3... Hotels and campgrounds will reopen". But another article, for San Francisco, lists "All hotels and lodging for leisure and tourism" only under "Phase 4".

Even if I am not staying overnight in a particular county, this article says, "When planning road trips for the summer, experts say that it's safe to assume that if campgrounds and hotels are open, then travel is appropriate."

Another confusing statement is on a San Francisco government site (updated June 22): "You can fly in and out of the Bay Area only for essential activities or business." This statement is phrased for the entire Bay Area -- but San Mateo County, which is in the Bay Area and the home of San Francisco International Airport (SFO), is currently in stage 3 as of June 17. If I cannot currently fly in or out of SFO for leisure, this seems to indicate that stage 3 may not be sufficient.

For leisure travel in California, do I need to wait until all counties I will pass through are in stage 3, or stage 4?