I came across this site a few months back looking for information on a gray water valve for my camper. I have included a link to the PVC engineer's website so you can download a copy of the plans in the Adobe Acrobat format. I personally like the garbage can and flag stands. It's a good idea to start with the basics, and add items as you need them. These PVC items can help keep the camping budget in check. With the money saved, you can buy more tri-tip and ranch beans. Just a thought.
Perfectly Versatile Campsite