Poor water pressure problems. I don't know where you're living, but a lot of campgrounds have wells, which often have either high iron or high calcium content in the water. If you get a LOT of water spotting on your shower door you've got hard water. Quick unscientific test for iron? Put a white washcloth under a faucet and let it drip overnight. If you've got rust stains, your water has high iron content.
In either case start looking at the hose connection:
- Inline water filter? - Changed it lately? If not, do so.
- got a screen in the hose? Check it and backflush if needed
- Screens in the kitchen & bathroom sink faucets? Take them out and clean them.
- crappy water flow in the shower - get an Oxygenics shower head, you'll like it.
- water pressure regulator going bad? (find it &) replace it.
- White hose got green stuff growing in it (It can happen when a hose sits in full sunlight. New hose wouldn't hurt.
And to find the drain pipe for the AC look in the curbside wheel well probably in front of the front tire. It's about 1/2 inch in diameter and hangs down about 2 - 3 inches into the side of the wheel well. If ANY water is draining you'll see the drips. Again you can grow algae funk in the moist drain pan or line. Use a wet dry vacuum to encourage the clog to come out - just hold the drain line between your fingers and put the hose of the vacuum up to the opening.