Thank you all, we've been busy this weekend sorting out and packing
So we've got the footprint, tent, poles, carpet, extension, cupboards, tables chair in the trailer.
I've done two boxes - one with plates, cups, wine glasses (v important) and non perishable food as suggested - tea, coffee, oil, s&p, beans, rice, cereals in that I plan to keep stocked. A box with household type stuff - foil, freezer bags, anti bac wipes, kitchen roll, tea towels, matches, pegs, torches, batteries, bbq equipment etc
I have a lovely shiny new icey tek - I'm borrowing the laminated list - that's a great idea