Annually in Harrisburg, Pennsylvania unicycle trials competition is held in the Farm Show Complex. I am curious, has anyone ever competed in this event. If so how much is it to enter and what kind of skills do you need to have in order to do well? 
yes it is
I have competed 2 times and I was there last year for setup but couldn’t ride. It seems there will be no trials this year (uni, bike or moto) as discussed here:
It’s a shame too. It was a fun event for trials unicyclists of all levels. It was expensive to enter ($25 or so I think) but the obstacles were always good, as was the turnout.
I was really looking forward to possibly doing that competition. Oh well… Thanks!