I imagine it would work well. But if you want to try a cheap fix before buying the rod, do this. Take two binder clips. Attach one at each end of a length of string. Before going into the shower, clip one to the center of the curtain about where your elbow would be. Attach the other one to something straight across in your bathroom, if you can. In my previous motorhome, I just wrapped the other end around the toilet paper holder which was on the opposite wall from the shower curtain. Hope this makes sense.
I found this wonderful solution on this forum and it worked great for us!