The daffs are definitely 'cool, dry, shady'. Net onion bags or real bulb bags help to keep the air circulating around them and any mould at bay.

The Iris - depends what you're planting. Dutch, English, etc Iris can stay out without harm. I'd put I. reticulata into pots, and bucharica. They like a dry summer - but not out of the ground, as far as I can tell. Past a certain point they are more likely to look like cooked chestnuts than lively bulbs. The leaves sort of start, then yellow, wither, and fade to nothing but disappointment.

Muscari tend to get a bit rubbery if left out of the ground, particularly about now as they'll be initiating new roots for the coming season. If you're not talking 'zillions' potting up could be the answer. They don't mind being transplanted later, IME.

Just a thought, but you could take a long, narrow trowel, stab it in the ground at the appropriate depth, pull it back to open up a pocket and drop in a bulb. Doing this halfway between your annuals would let you go on and plant without disturbing your annuals. Then, next spring, you will know to plant the annuals halfway between your bulbs.
It works.

The words "cool, dry place" refer to storage. If your house is air conditioned, a closet or under a bed is often a good temporary storage place. Just remember them! :)