Hydro cool it, spin it dry and put it in a refrigerator covered either with a damp towel (best) or in a plastic bag.

the quality will not be the best but they should be sellable after 4.5 days in storage.

If you do not have rtefrigeration you will have chance the heads going to flower and cut them friday as they will not hold at all in hot conditions (anything over 42ËF)

i would just pick it in the early morning before it gets hot out and put it in a cooler with ice or refrigerate.