Hi Dan,
California is different from all the other states in the US in that to launch any model rocket, you'd need permission from the local fire authority (i.e. your local fire marshal), in addition to permission from the land owner (usually the city for parks). For better or worse.
You can simply show up for any LUNAR launch. The club does all the paperwork needed for the launch, as well as provides all the launch equipment. So you don't have to worry about any of that. You simply bring your rocket and motors, and that's about it. You do not need to be LUNAR or NAR member. Club charges a small daily fee (goes towards equipment maintenance), or you can opt for annual family membership ($25 last I checked).
Same is true for all the other rocketry clubs (the other nearby club with regular launches is Tripoli of Central California, or TCC for short).
Note that launches at Snow Ranch are fire risk and weather limited. If it is too dry (no rain), we can't launch because of the fire risk; our launch site is in the middle of a large grass field on a cattle ranch. If it is too wet (too much rain too close to launch date), we can't launch either because the pastures are too wet and muddy. November almost never happens because almost every year the conditions are still too dry (too high fire risk) out in the field. December is a more realistic first launch of the season.
The other nearby club (TCC) has a launch site on an empty plowed field, so they are not fire risk limited. However, they are a bit further away (near Fresno).
Hope this helps,
Alex