mcandsim -
I won't ask how you get "wet" when using the toilet ...
.. this is a family-oriented forum
and you do not need to explain. I'll just use my imagination
.
You didn't mention what brand of toilet you have but Dometic and Thetford are two popular makes that come in a high profile model -- about 18 in and a lower one about 13-14 inches.
Sounds like you may need a "high profile" model
.......
Go online and checkout Camping World for specifics about both of these brands. Many RV toilets have foot pedals to flush.