Double duty ollas

I had trouble growing watermelon last year, so I put in a few hugel beet beds. I read watermelon like warm soil, and sometimes watering cools the soil down and slows the growth. I don't have a clue if this is true, but I decided to put a couple  of diy ollas. I plant the watermelon around the ollas.  I used the saucer as a lid. I fill the saucer with water every day.  I have seen bees, and wasps drinking. We have tons of lizards, dragonfly and toads. There's also snakes ( hopefully only gopher, and Gardner snakes. I don't usually see them which makes me happy)
Ollas water watermelon and and lots of critters.

I can't help but wonder if this is one of the contributing factors that led to rats making nests in my raised beds. We live in between an almond orchard and walnut orchard, so always have to battle mice and rats, but in all the years gardening I have never had them in my garden beds. I wonder if providing water for the beneficials I'm also making a great home for rodents? I wonder if the ollas makes the bed cooler in addition to providing water.