Swampy K2 evaporative cooler

I don’t have any experience with that product. But, I will note that you might also want to lower the temperature using sun shade fabric.

No knowledge about the cooler model, but educate yourself about evaporation or swamp coolers.
I moved to Las Vegas year ago and had to do it as cooling big house with AC in 124 F weather can get really costly.
So they work excelent in single digit humidity.
Work good in teens of humidity.
Are useless once humidity exceed 30%.
Now I know San Diego has 4 (if not more) climate zones, so any advise has to be location-specific, but from my experience - don't expect too much staying close to the Ocean.

I purchased one--not that model. As it is winter I have not tested it.

"Swamp coolers" only work in dry climates and require a lot of water. Forget using one for "dry" camping.

Yup,,,,We have a K2 model and live in San Diego County. It's a very nice unit; works well in dry SoCal type climates. We cut out a piece of masonite and velcro it to a bedroom window; cut a 4" hole in the masonite and attached a duct fitting; open the window, cover the screen with the masonite, attach the 4" flex hose that comes with the K2 to the duct fitting and to the K2 unit; cools off the bedroom area quite nicely in our Host camper. During the winter, I run it w/o water to produce "white noise" and air flow.....I think it was a very good investment.

I have a old six-pac tc I have set up exclusively for dry camping in the desert. I live in southern nm and use it for camping in nm and az. I am into desert gold mining. I put one of the turbokool units on my tc. They work really good provided the humidity is low i.e. Less than 12 percent. You can expect around a 20 degree temp drop from the outside air temp. Low amp draw 4.5 amps , I run mine off the load terminals on my charge controller. 2 - 100 watt panels and 30 amp controller. One very important thing , do not use tap or well water!!!!! The amount of mineralization in the water will have you replacing the filter / cooling media every week. I use a pump up 2.5 gallon bottle to supply water to the unit and only distilled water. Under ideal conditions it uses about 3 gallons a day. I only use it during the day.

There is a way to avoid mineralization by purging the water.
I have huge evaporative coolers in my house and they have automatic purge pump that drains the water every 6-8 hr of use.
Than distillate water is 89 cents/gal at Walmart.

If you want to build yourself a low-cost and highly field-tested swamp cooler, google "figjam bucket cooler".