New to truck camping - Palomino HS 2902 with flatbed?

It’s going to be difficult without the camper unless you have some detailed measurements . If you can remove the sides to pick up the camper perhaps you can find a temporary place to hook the tie downs . You definitely want them inboard of the flatbed sides so your side panels can close . Most campers have a drop down at the rear of the floor at the 8’ mark which means you’re going to need a spacer between headboard and camper with that 9’ bed . Best to have the camper first before doing to much customizing .