Daren, I couldn't agree more with KeithB. A second hand fridge is a must. (Try and get one with a fairly large freezer section for your crabs etc). If you can get one, and you dig your own ragworms, then sort them out and only put fully intact worms in your water trays. Any broken or even slightly damaged ones should be put into Vermiculite in a container and put in the 'chiller' part of your fridge. I don't realy know what vermiculite is used for, but it must have something to do with gardening as you can buy it at most garden centers. (Shaw's of Cramlington definitely stock it 'cos that's where I buy mine.).costs about £2.00 a bag, but it lasts a while.
Just one last word Daren, if you want to keep your tanked worms as long as possible, then change your water every day WITHOUT FAIL.even if the water still looks clear; and obviously remove any dead worms. If any become damaged, but are still alive, then move them into your vermiculite container.
If possible keep a stock of sea water in the fridge so that when you change the water it will be at the same temperature.
All this might sound a bit of a slavver, but if you take a bit of time and care your tanked worms will keep for many WEEKS. whist your worms in the vermiculite should still keep for a few days.......so obviously use these up first on your next fishing trip..............
GOOD LUCK....................................
BAZZACODBASHA