a few hours upside down will be ok. you can use an empty dishwasher rack to store them, or a bottling tree.
I myself use star-san to sanitize because its no rinse and you do not have to wait for it to dry.
i'm told a little too much iodiphor residue can be tasted in beer, but star-san lends no off flavors. (i've even tasted star-san so I'd know what the off flavor would taste like).
nothing wrong with iodiphor/iodine sanitizers....but I think if you tried star-san, you'd be forever hooked. it stays active for weeks instead of a couple days like iodine, it won't stain anything like plastic buckets or carpet if you drop the bottle.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10