Camper Trailer Floor Fix

You could have a look at very old post 2008 .. 61199 ( now achieved ) might give you some help , not sure about your problem . I did a Google search and this way the 1st to come up . Also was a post just recently about camper trailer floor .

I don't know the particular camper in question I'm presuming it has some form of a plywood floor,

know I've trod on few mine site style dongas and had the floor move underfoot somewhat alarmingly

Maybe a long job of stripping out to bare chassis and relaying a suitable marine grade plywood, or something used for floor boards for houses (think its about 18mm thick in the trade section of green shed red suit place (hardware chain with predatory tactics)

checker plate, id go pay a visit to Capral they stock various thickness sheets of tread plate -they only sell don't bend or engineering works

Hi Bebbs68
If buying from a hardware store then be mindful of weight as most options will be on the heavy side. Also marine ply options at hardware stores is a total con. It will generally represent their premium product but is not certified marine plywood. A loophole in Australia but off topic now. Occasionally you can find form ply that is pine based so it is lighter but durable and realistic price.
You probably will need to stick with similar thickness as original for simplicity. When I built my van I had some sample pieces of a 12mm product that was light and moisture proof. A fibre glass composite designed for van flooring. It looked really good and I still use the sample pieces under my jack when unhitching the van. I ultimately used a very light weight honeycomb panel that is 30 mm thick.
To do your job properly will probably be a big job and will need a complete strip down to bare chassis as someone else suggested. I am not familiar with your van though.
All good fun.
Enjoy
Roy