I recall two lines of port-a-pottys. One is close to the shower and swingsets, the other is across the grounds, past the main stage, by the volleyball sandpit.
But without the rudeness... yes, pictures would be very helpful for anybody searching.
This picture is one of the best NAP shots ever:
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Very pretty woman, totally naked out in broad daylight with clothed strangers all around, and just look at that huge grin so you know she's having a great time. Love it.