That's an excessive amount of toilet paper, we are led to believe. Let's say two events a day or 558 attempts. Single ply is 1000 squares a roll. You should only need a little over 2 rolls for that trip.
A bidet would improve the chances, but a bidet on a composting toilet seems problematic. ...
Our heads (Lavac) are mounted on low steps, perhaps 5 inches high. By happy accident, it is very easy to kneel on the shelf, and pee directly into the bowl from about 4" above the rim. This almost entirely eliminates the splash. If I was building a boat or redoing a head I'd try to arrange that...