If you go with PVC pipe, you can fill it with sand or water and cap it off to add some weight I you want. Kind if defeats the purpose if keeping it light weight though.

I made some simple ones out of metal and use the cheap furring strips for the uprights. They are light weight and easy to transport. Especially in the bed of my truck.

If it gets too windy I can just toss sand bags over the bottom middle part of the stand.

Sorry, no pictures.