I only flatten those HL boxes that came with styrofoam peanuts. I put the peanuts in trash bags and store them in my attic.

I keep all the styrofoam molds. I rotate my display every so often so I feel putting the HL's back in the plastic bag and into the mold is the safest way to store them.

I do not display tent cards. If I forget where the light is from, I'll have Bert come down and tell me which is which (lol !).

Bob