You can keep rag for a long time in good condition if you do it right.
Whatever way you received them is probably sufficient if kept in a fridge to keep them for two weeks. I don't know what you class as a lot, but if it's enough then get yourself a large fridge and put cat litter trays in it and put the worms in that just barely covering them in seawater, change the water daily, you can keep them for months like this.
P.S.Forgot to mention, whatever way you keep them, check daily for dead worms and remove them, otherwise the whole lot will die.
Last edited by EoinMag on Sun Jan 20, 2008 9:16 pm, edited 1 time in total.