The sign for the Stout Memorial Grove where the Andersons went to camp in is a near perfect copy, including a close approximation of the lettering font & the word arrangements, featuring even a " - " in the OPEN - SUNRISE TO SUNSET notice that could have been left out in less attentive hands. But, along with no redwoods indicating it was filmed elsewhere, the sign is mounted on spindly metal legs instead of the "stout" wooden posts holding up the (larger) real ones & there is no horizontal 2nd sign underneath that reads on 2 lines "Redwood / National and State Parks."
If you are camping in the redwoods. You might want to show some redwood trees.