A really cool concept, but a lot of camping gear needs to be strong. I could see the Carabiner 3d printed great for just using as a "clip" on your backpack or belt. You obviously wouldn't use the 3d printed plastic carabiner for climbing....
I honestly do not know enough about 3d printing, but are there consumer 3d printers out there that print in metal? It would be awesome to print your own metal stakes and carabiners.