If squeeze can, why can't I? In my particular case, though, my clothing/personal item bag is airline carry-on sized (i.e., one pannier bag). An extra pair of shoes does take up considerable space in that. If they end up coming, it'll be a lightweight moccasin or just a pair of shower sandals.

I've given in and am attempting this walking everywhere in SPD compatible shoes, I've spent considerable time running around looking for what I felt was the best pair to accomplish this. The shoes didn't feel bad in the showroom, just gotta wait for them to arrive and see how they really turn out. I've always ridden my longer day trips with only one pair of shoes, I simply have no desire to change shoes all the time, regardless of how little effort it truly takes.

I am interested in this biking in sandals concept. I may have to give it a try this summer.