There are a ton of reviews for this place already so I will try to keep it short and only add info that I didn't see mentioned in previous reviews.
Showers are $0.25 per min ($0.50 min to start). You don't get to adjust water temp, but it was pleasantly hot. Showers are non-gendered and individual.
Dump station is no longer free; all California State Parks are charging $10 to dump now, even for campers. You pay at the dump site with a credit card. There are 4 dump holes and a potable water fill as well.
We love staying here as it's so convenient to Capitola. We were able to park our RV in Capitola and walk to the shops. We got last minute reservations (it's really hard to book a site here in the summer), but had to move sites in between days, and so we used that 2 hour block between noon checkout and 2pm checkin to drive the RV to Capitola. It seemed like it would have been too much of a hassle to try and get to move to the new spot before checkin, so this worked out fine.
We love all the state parks along the beach in California, and I'm sure we'll be back at some point.