Shimanos sandals because they adjust with straps, so, are versatile with thick or thin sox ,

and for rain there are gore tex liner sox to wear over your own sox to keep the feet drier ( or plastic bread bags . )

Walking for a long time in a SPD cleat is not good for it .. Myself a sightseeing shoe was worth packing, as I was in Europe

and not staying to rolling up the trip milage, primarily ..