Put a paper towel down and find out just there the waters from, side under the pedal, back, rt side. Lifting the toilets no big deal, 2 bolts and a water line. Unlike S&B houses there is no wax ring it's a foam rubber type ring. The Theford Agua II has a repair kit available for the pedal leak, if you go that route DO NOT LET the pedal return spring get loose. I did and a buddy did the same thing, it can't be put back in. That said I switched to the Dometic 300. It's much better unit and actually swirls the water flushing, about $150. The 300 & 310 models are the same with the exception of shape, ones round the other oval.
While you have it out, put a shut off valve in the supply line, it allows the water to be shut off at the toilet and not the entire camper.