Is this overkill? For an overnight(s) ultimate frisbee tournament I did this set up to protect front the rain/storms and it worked great! Would this also help with the heat. basic ez-up canopy over a 3p Coleman sundome : camping

If it worked, it’s not overkill!

I had a tent wet out and soak me overnight when I was a kid. I’ve never forgotten how uncomfortable that was. I have much better tents now than we did then, but I still sometimes put a tarp over the tent when the forecast is particularly gnarly.