answering your questions
!. Not sure how you are set up...roof on run, shade trees?? How good is the drainage etc. I live in SoCal, dry and arid, I have a roof on my run and it is under shade trees. what I did is I got a battery operated timer that hooks up to the hose bib and then connected...
https://www.amazon.com/gp/product/B07D8XRMCZ/?tag=backy-20
This is what I got for my run and they work great drops temp in the run quite nicely and :welcome