Omars answer is more practical. Unless you live on either side of the pass and don't mind driving a relatively short distance, then it's best to call and ask, or check their website. I just went there with my family and it was amazing! I came all the way from Orange County and I don't think I would have drove all the way up there just to ask. Call first, don't waste gas or the trip unless going there for certain. Check out the amenities online first, and then call for finalizing details.
Not sure! Best to ask on-site
for what , camping , boat launching, the yurts or day use?
You may want to give them a call if you can, specially if you don't live close by to Lake Cachuma so you're not driving out there just to ask.
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