I use clipless when touring. I have quit using toe clips because I cannot find a good hard soled cycling shoe for toe clips anymore. I thought that the Sidis were the best shoes made for regular pedals, the had the best system for retaining the cleat.

Also with mtb shoes and SPDs it is possible to walk around without looking awfully strange.

If anyone knows a good cycling shoe that has cleats that can be used with toe clip and regular pedals, let me know.