Drive to McArthur. From CA299 turn north onto Main Street. Stay on the gravel road until it splits. Turn right (east) if you want to go to the Rat Farm, stay left (north) if you plan to launch from the Tule site. Both roads dead end at their perspective launch sites.
There is no fee to park or launch from either site.
Both have nice pit toilets.
No water is available at either location.