These are rough guesses. Bulbs have a dormant season after foliage dies. That is the time to dig. I've never kept bulbs out of ground for more than 2 months but maybe.in cold winter areas you have more leeway.
. Lilies are the most demanding of your to-be-moved. They shouldn't dry out. Nurseries sell them for ?.... 2 months. In peat in plastic bags.

Bearded iris can be dug at any time if you don't mind skipping bloom. Usually dug right after bloom or in late summer. Stored dry, 5 months. Expect them to sulk for 2 years.

Daffs & hyacinths - after foliage has yellowed at least 1/2 way it is fine to dig. Safe stored for 4 months, maybe 5. Ours have new root growth in Sept. Don't know if they do that in zone 8.

Elephants Ears - don't know their cycle but dig after foliage dies down, when dormant.

If bulbs are in active growth, a large shovelful of the root area has allowed me to move them without loss. I'm going to do that with a pink scilla that has shown up where it doesn't belong! Good luck.