Far right, lower sign...crumb numbers?
From observation outside fellers look older and civvy.
Kneeler looks youngish and MIL.
There aren’t enough tats to be military, except maybe for the guy with long sleeves (to cover his identifying tats).
Got it! Those are folks who just drove up to the sign and took a pictue...cos vacation, you know.
I did that once in Fairbanks Alaska. Can’t remember the name, but it was the Army base.