Bubba,
Here's an idea for a cheap solution to an outdoor shower I used on my 95 Chinook.
Get a short drinking water hose (like 6-10 foot). Get a faucet adapter so you can screw said hose to a faucet. Now buy a good quality garden sprayer....one of the ones that has the rotating head for different patterns. Put it all together and toss the hose outside and you have an outside shower. On our 95 you could reach in the kitchen window to adjust the temps. It worked great and was super cheap.
One thing you may want to do is replace the kitchen faucet. Most RV ones are crap. Go get a house one. You won't regret it.
You can study up on your Chinook history here:
LINK