i pondered that myself. i think i'm going to buy free standing shelves and mount them to the floor and ceiling on one side, and frame a 2x2 wall on the other side and the front with horizontal stringers to tie stuff off to. i thought about screwing to the floor and roof members and using construction adhesive on the walls. i dont want to poke holes in the seamless walls.
i want it basically open inside so i can fit my Ferguson TO35 in there or cabinets that i build and need to deliver.
i talked to a guy today and looked at his trailer, he's a floor finisher and he got shelving at home depot that looked like it worked well to hold his tools and chemicals. i need a similar setup for tools but also a large empty space for hauling stuff.
what size if your trailer and what year is it? did you buy it new? what did you pay if you dont mind me asking? i'm looking at $3700 for this trailer (2006, 9800lb gvw)