Signs in Enlish and Spanish won't work either. I think research into what appropriate Korean picture would work along with a sign in Korean might help. I didn't see too many Hispanics in those pictures.
The Forest Service could also help by issuing citations to all those without the proper day use pass. When I last went to Jackson Lake there were signs requiring the pass. I just wonder how many had passes?
Your absolutely correct, the FS could issue NNC's to those parked in no parking zones and without adventure passes. The problem is, FS doesn't have the staffing and they cover many miles of territory and can not possibly cite enough violators to make an impact on the population we had this weekend. Hopefully this situation can be remedied in the near future.
Additionally, during my ventures to the snow play areas, 90% of the population spreading their cheer where Hispanics. When I was at Apple Tree yesterday not one vehicle had an Adventure pass and I'd guess 60-70 vehicles were parked there. At approx. 5 minutes to write an NNC without interruption,

do the math on how long it would take one person to write up 60 violators.
I mentioned previuosly I spoke to the CHP officer desperately trying to enforce traffic at Mtn. High of the Lake issue. He placed a call and it may have done some good. Today two new signs were installed with more to come soon. One on the north end along Big Pines Hwy and the other in the parking area to the south. These signs were not there yesterday.

I spent the day shooting some weekend aftermath photo's and once uploaded I'll post them.