While I do not exactly what type setup each has. My last TT had the tub with cloth type shower curtain. I installed "splash guards" in the corners with double sided tape from Ace. They are 6" x 6" triangluar pieces of white plastic that has a slot in them for holding the shower curtain. I have them in the kids tub at home too and they work great.
What also helped was a cheap home size clear or white plastic shower liner that I doubled up with the orginal cloth curtain. When I installed the liner I started one hole in leaving about a 8" extra piece to lay flat against the back wall and did the same on the head end. By doing this you have a decent amount of curtain coming into the shower sealing it off pretty well. A damp wall makes a good adhesive. A simple cloths pin on top can hold it back if you don't like the way it looks when not in use and open. The home size ones also are longer so you might have to trim the bottom as well.
These mods are about $20.00 total and will keep 99% of the water inside, level or not.
2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's