The problem with the pop-up "phone booth" shower is the fact you have to be completely surrounded by the shower curtain to make it water tight, so there is no way to attach the showerhead to the wall without leaving a big gap in the curtain. We have the same issue with our pop-up, but I am in the process of solving the problem. I cut out a 4" square piece of steel, ordered a strong 3" round magnet, and a shower head bracket. The shower head bracket is screwed to the magnet and the steel plate is permanently attached to one of the shower walls. After the shower is set up, and the curtain is hung, the magnet with the bracket is then stuck to the plate with the shower curtain between them. As soon as I get it all installed, I will take some pictures and post them.
Bob & Doris
2009 Toyota Tundra CrewMax 4x4 - 5.7L - 6 Speed Auto - 4.30:1
2013 Rockwood HW296