Storage options will differ between the different types and sizes of hard floor campers. Classic example is take a look at the Cub Camper range.
http://www.cubcampers.com.au/ http://www.cubcampers.com.au/pdf/speclist-complete_2012_07.pdfJunior and Kamparoo, being the shortest campers, there is only the under bed storage and if you include the slide out kitchen and pantry, there is not a lot of room left.
Supamatic and Spacematic are similar design but with a longer body there is more room to store items between the end of the bed and the end of the trailer.
Spacevan and Supavan are similar but taller units and allow room above the bed height of the camper. Do a search there are a few on Myswag.
We started with a Kamperoo that did not have a raised bed as such, a bit like a empty box trailer with a lid on it. Made a raised bed to have a storage area underneath and the bed made up ready for when needed. Due to ailments we found the distance from the floor to the bed was impractical for us and moved up to an older Supamatic. A slightly bigger camper but offered more practicality for us. From the ground step onto the now hard floor, step onto the floor of the trailer where the bed height is a more convention height.
Our Supamatic came with a 60 litre three way fridge freezer but as we already have to other fridges I removed the fridge from the camper giving us a clear storage area across the back of the floor of the camper about 60cm wide. Means I can store a lot of the bigger stuff there.
So what do we store in the Camper. I wouldn't know what the bride has stored away in there but the kitchen is always stocked with utensils.
Under the bed as best I can recall: Cgear matting, table, chair, toilet tent, folding pantry, lights 12v and 240, broom, rake, dust pan and brush, small clothes hanger and whatever else I have forgotten.
On the step at foot of bed: toilet, large tarp to cover camper and annex, second fridge (if needed), and whatever else will fit.
Bed is left made up and the only thing pack on the bed is the folding solar panel which still allows the camper to close with the annex attached. Pillows are stored in a Spacecase, along with a solid Icebox contianing non perishable food, which are secured to the top of the camper in the roof/feet metal box frame work which can double for carrier assorted items like firewood, firedrum etc.
In the toolbox on the drawer bar is the usual stuff, pegs, ropes, chairs, leads, bigger ropes etc.
For your lit of items:
Water filler hose - camper in front of slide out kitchen
Camp ovens - Bride uses saucepans etc stored in camper
Toilet tent and toilet seat - tent under the bed and toilet on floor at foot of bed
Shovel - vehicle
Table & chairs - under bed camper and moulded set in vehicle as well
Spare parts - tool box and vehicle
Wheel chocks - toolbox
Wheel jack & wheel brace - vehicle
Chainsaw - vehicle if needed
Extra canvas/poles - on floor at foot of bed - must make pole carrier