Port o’ johns, not my favorite places to do my business, but…
I’m sure most of you have been in a port o’ potty at least once in your lives and I’m sure you have held your nose for dear life, I have. And as you have experienced, they are nasty!
The best time to go to the port o’ potty is first thing in the morning, more specifically, first thing in the morning on the first day of whatever the event is. If you go at the “right” time, it’s pretty empty and no one has done any real damage.
Not much else to say just get there early and you should be ok!