Wilkinsons and Lidl have some useful fold-up crates with handles - not as big as the regular ones but maybe useful for moderate-weight washing up?
I use the regular ones aas a laundry basket as they fold up neatly to go in the cupboard (there's always an excuse er, reason for buying camping things if they have a 'home' life too). B&Q have fold-up ones too, sometimes in packs.
------------- Camping - emotional resilience in action, a triumph of hope over adversity and antidote to virtual reality.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.