I was searching online and couldn't find any information on the accessibility once you're in the campground 

Does anyone have any intel on this campground? 

Here are some photos:

https://www.yelp.com/biz/pipi-campground-pioneer

thank you I looked at those pictures they dont really give you a good idea of how easy it is to maneuver through the campground though

From reading reviews and looking at the photos, I get the impression that this isn't geared to big rigs and it's not one we would go to.  

Have you ever seen this web site?  We used it all the time as we did a LOT of national forest camping. It's especially good for directions, easy in/out and site size.  This couple personally visited all these campgrounds throughout the country.

http://www.forestcamping.com/dow/pictures/pictures.htm