C.T.
I would select just one and put the other way. when you have that many kids, it is about supervision and frankly, no matter how well intentioned, most moms see a party as a break and believe there is some one running things..of course, mom's keep an eye on their kids but the risk of jumping slids is real and pools are high risk..drowning happens in the most innocent of situations...
I have a gated pool and at our 4th party last year, never sat, just counting heads...the only other real set of eyes was our neighbor, a fireman, who deals with this all the time!
Kids love sprinklers....popsicles and bubbles..