I carry an East German Army surplus folding shovel/pick in my camper, a US Army folding aluminum shovel on my backpack, and a miniature folding (chinese made) shovel in my dayhiking pack.

I carry folding ss hand trowels in my and DW's GHB's and in DW's BoB.

I was really impressed with the winner of Alone season 3's choice and use of his multi-purpose shovel. I think it had a saw blade on one edge of the blade and the opposite side of the blade was sharpened to be used as a machete. He was very practiced with that tool as well.