Sounds like a fun tour you're about to go on. Is it through Woman Tours?
What about Wellgos or pedals that are spd on one side and flat plaform on the other? That way you could clip in when you're climbing, but still have the flexibility of putting on your flip flops (or whatever) and riding on the flat side. I like spd's and mtn bike shoes for touring (what little I've done). I like being able to walk normally in my shoes. I just bought some of the Keen commuter sandals from TE (and they arrived today- but I can't try them because it's raining). I digress.. use whatever is comfortable for you and what works best. I, too, think that bmx pedals wouldn't be a good idea for the 5 day tour, tho.
Or...take both sets like SadieKatie suggested.![]()