The parking lot for the outdoor ranges(rifle, pistol) are at least 1/4 mile from the road. By locking the gate and selling keys creates income to fund range development/repairs. They change the lock every year and sell new keys. You may use the range during the day, 8a till dark, I think, unless there is a scheduled event. The newsletter has a calander with all scheduled events. The local law enforcement agencies (state, county, several cities and border patrol) usually plan far enough in advance to get published in the newsletter. They usually shoot 8 to 5 for qualification and training, several times a year. I'm sure you can't share a bay with them, but others are open. If you show up during a scheduled club event like Highpower (Wed 5 till dark) and just want to plink or sight in a pistol, they will work with you. BUT expect to pay a range fee. $3 for members, $10 non-members. I don't know how they are working it now with all the new bays, but when there were only 2, the range officer had the option of charging you regardless which bay you were on. Most exercise that option, I know I did. Gun clubs only have 2 sources of income, membership dues and range fees, if I didn't want to pay a range fee, I made sure I showed up during non-scheduled times.
Fred