I haven't seen an orchid yet that didn't like to be mounted on a tree or part of the tree.
In fact, if you're about to lose one of your loved ones ... one of the best way to revive them is to mount it on a tree with a little spaghnum moss.
The cattleyas below were all in danger of dying, and most of them had 3 leaves or less, shriveled and on their last leg when I mounted them on a trunk of a cut down Australian Fern. BOY LOOK AT THEM NOW!