I tried to sit down and make a list of what I would wear every day of our trip. I was very happy to discover that I think I can do a good job of limiting thing...and only 3 pairs of shoes packed plus the ones I'll wear when I fly in. It's a miracle!

But then I keep going, "oh but wait I really like this shirt, mebbe I should bring it too" The temptation is strong. /QUOTE]
I did the same thing - I do this for almost every trip. I also enter the forecasted weather for each day/night and then "assign" the clothes I'll wear each day/night. Of course once I get there I'm likely to toss the plan out the window and just wear whatever I feel like wearing that moment <g> but this way I know I have enough clothes for the trip, and all the little extras to go with each outfit.
My packing challenge is the fact that SB is away from home right now, and will be flying in to meet me at WDW before the cruise. Today we figured out which of his clothes he'd bring from where is now and which I'll bring him from home. When I pack at home, I need to leave enough room for the stuff he's bringing with him - like his suit, and a couple extra pairs of shoes. It's so strange - I've seen this man wear the same pair of shoes except for perhaps ONE day in the past year & a half - yet he needs 4 different pairs for this 4-night cruise, lol!
On the marathon - many runners bring their families and make it at least a mini vacation. Several of the runners are associated with charities and their lodging/park passes are included for them (they have to raise a certain amount of money). On Saturday there will be 16,000 runners doing the half marathon, which will end by 9:30 am. On Sunday there will be 14,000 runners doing the full marathon, which will end at 1pm. You can expect to see roads closed off to vehicle traffic while both events are taking place. For the half, that would be just the road between Epcot & MK, but on Sunday there will be more roads closed. They'll set out orange traffic cones the night before.
We're staying at Old Key West, so we can make a quick exit out through Downtown Disney to head for the cruise Sunday morning. People staying further into WDW might want to check the marathon route map to see if the roads they'd be using might be closed. The route maps are on Disney's Wide World of Sports website. Runners have to keep a pace of 16 minutes per mile, so you can ballpark what time sections of road will be opening back up.