mounting orchids in terrariums

[Becca]

This may be a stupid question and sorry if so....but I would love to have a natural setting in my next orchidarium (I just acquired an Exo-Terra) and I am not sure how to go about making it look natural and mounting the orchids to the walls or on floors like I have seen in pictures. Is it better to put the orchids on individual mounts or is there some secret I should know about? I see materials such as coco fiber panels and tree fern panels and I am how to mount orchids to these, if I should, and is it safe to mount a few or several orchids to them and what if they grow into each other?
Just trying to get some idea's in my head before I get in a hurry and set up another wardian style case.