I know someone did this before on here and I remember pictures of bent hooks on the steps if you rely solely on the hooks. My recollection from the thread was that you have to put the ratchet strap over the riser part of the step itself. Please search for it to see what I mean. If it wasn't on here, then AT.
I have a set of these steps. Love how compact they are but wish I could get them tighter on the tree. They have quite a bit of play in them no matter how tight I pull the rope. I have hung aiders from them, too, with some success but still wish I could get them tighter to the tree. I put a cross piece on mine so I could hang my aider on it better and with that I could get both feet on one step. Not perfect, but workable.
If anyone works out a method for getting these super tight, please post it!