Originally Posted by be happy
I would start by taking off the shower head you have and running the water. First the cold then the hot, see if the flow is the same for both lines. If the flow seem to be good, should be about the same as bath sink. I would look at shower head for a screen or some other type of blockage. I know that the standard type shower head provides not much water pressure. I put on a oxygenics body spa shower head and it made a world of difference.
Seems like most of the campgrounds, after you put on the restricter, don't have much water pressure. I changed the shower head and line in my rv and it got better, then I turned on the pump and it got about as good as I need it to be. Not as good as a real shower, but I've had far worse.