Question on Calla (albomaculata) bulbs

I am in zone 4, and this year I planted a bunch of calla bulbs (Zantedeschia albomaculata) in a pot outside, because I knew they'd have to be lifted or moved. So, I'm prepared to do that. But how soon do I need to move them, and where should I put them? I have a 3 season porch, as well as a garage. I could also just move them indoors, as they're in a pretty pot. What would you recommend? Will I need to water them regularly, or just leave the pot be until spring? This is my first attempt at callas. :)

Water and fertilize until the leaves start to turn yellow, then stop watering. They must go dormant. When the leaves are gone, dig them and store them (in a paper bag in newspaper shreds or something dry) in your garage (if it doesn't freeze, 50 degrees is ideal but 40-65 will do.) Store until it is not freezing outdoors and replant with some compost in the hole.
Hope this was what you needed,
K. James