Thanks all for the tips. It is a new trailer and I'm thinking we just didn't have enough water in the system when we started using it. Also noticed that the TP was the standard household 2-ply.
I tried several power flushes to no avail. I ended up borrowing a sort of snake and pushing through the clog in the bottom of the bowl. Everything emptied out of the bowl with enough finagling.
I've replaced the tp with the RV kind and also put water and a chemical tablet into the black tank. Hope I don't get into this mess again!