I've been thinking of ordering some soft fruit plants from J
Parkers: http://www.jparkers.co.uk/
All their stock is sent bare root. I know it's very late in the year to do
this, but they say they'll ship until end of April.

However, their delivery times are fairly lax ('28 days'). Since I can't
know when they'll arrive, I can't guarantee to have time to plant them
straightaway (even in pots). Given that the weather is warming up, is there
some way I can keep them (for a week or a fortnight, perhaps) without them
suffering?

For example, I know they're activated by soaking them in a bucket of water.
Could I leave them in that bucket for an extended period? Or I have a
spare (working) fridge: if they were put in the fridge would they go dormant
for the period (as if there's been a cold snap) or would that be too much of
a shock? Would the humidity in the fridge cause issues for mould?

Any other suggestions (other than 'buy from someone else')?

Thanks
Theo