With the flip flop thing- I wear them all the time, outside of work I live in them. Weather does not deter me. My sister always makes fun of me b/c when I visit her in Boston during the winter I wear them, even in snow, as long as it's not to icy! W/ weather in CA and the winters, it's been so on/off the past couple of years. I would bring them along with other shoes that way if it is too cold you can wear other shoes, but if it's not, you got your flip flops.
Saturday morning is the 5k, it starts at Mickey & Friends parking lot, then you follow the tram trail over to DL, run around there and then over to DCA and you run around there a little. The finish is at DCA this year. Last year it was Main Street. Sunday is the 1/2. You start under the overpass of DTD down Katella into DCA and DL, and then it's about 8 miles outside the park and finish n DTD by ESPN. You get to go by the HOnda Center and run the foul lines in Angel Stadium, so that's cool. It's fun, you get to run backstage and see things you normally wouldn't going to DL.