Ideas for attaching items under the RV

I've seen people using Plumber's Tape (the galvanized metal with holes every inch). I've also seen heavier duty metal brackets and threaded rods used.

In my case I bought some UV resistant zip-ties and used a bunch of them to support my fence post rig for the stinky slinky.

I sure have tons of room under my off-road POPUP. Been thinking about doing a couple of things under there. I could probably hang a hammock haha...

I do want to put a safe lock box with access inside one of my cabinets... Also like those torklift hangers for batteries - thats a neat idea.

A few holes in the frame will not harm it at all. And will by far be the most secure way of attaching something. Drill proper size holes and use self tapping screws/bolts.