My folks are the asst. managers at Mustang Resort and the gate opens at 4:30 am. ForkedJames was correct in saying there is an honor box at front door to store. Fee is $3.00. The ice machine is also unlocked and you can get ice, just put fee in honor box as well.
Have a great day on fork. I heard the fishing was great today during the SPRO tournament.
Yeah they open in the morning early for the fisherman to get to the ramp, but try to close it fairly early to keep the riff raff out at night, the gate has cut down tremendously on the thefts that were in the area a few years back.