I had a toilet leak while out camping, water appeared to be trickling from the front of the toilet base onto the floor.
The actual leak was at the rear top of the toilet where the water supply line attaches to the toilet. Reace replaced the rear assembly of the toilet, problem solved.
Sorry, I don't know if the 5.0TA has a water shutoff valve just for the toilet. My 19' is from the recent era when Reace doesn't install a toilet shutoff valve during the factory build, so when I had the leak I had to shut off all water supply to the trailer. It was pretty inconvenient. I tried wrapping teflon tape around the connection, but that didn't solve the problem.
I have since learned that it's apparently pretty easy to buy a "plug" to plug up the water supply line. Apparently you unscrew the water supply line from the toilet, and thread the plug onto the toilet water supply line. This allows the rest of the trailer to have water service while the toilet is out of commission.
Of course, your trailer may already have a toilet shutoff valve, I just don't know. Good luck fixing things up, I know how unpleasant it is to have a toilet leak on a new trailer.