What it's the website to make a reservation ?

There are 3 spots in the area to the right of the office in the middle of the turn around loop that are only big enough for a tent or camper van. I didn't see any tents there during my stay.

And you know,if they have spot for tents?

It's on the Thousand Trails website. Try to request a site as far from the freeway as possible. Really really loud!

https://rvonthego.com/california/marina-dunes-rv-park/