Lots of plants to store

I know its a bit early to talk about the fact that we are having our garden re-designed in September, but I want to get myself organised as I want to try to hang on to alot of the items I already have in the garden. As the whole garden is being done I will not have anywhere to hold any plants. They will all have to be stored in trays or pots.

Tulips, daffs and bluebells, shall I dig them up as soon as they all finish or leave it til later? Also do I pot them up, or dry them and leave them in trays in the shed? I'm very much a hands off gardener, I've never lifted bulbs corms or anything else for that matter I normally just leave them all to their own devices but this time I can't! This is a conversation that is going to go on and on as I am likely to be asking such questions about all my plants as the seasons go on. So thank you now to anyone who has the patience to keep helping me!