My suggestion is to skip the toe clips. If you really want platforms some of the time I'd go bare platforms and when you really want retension put on the bike shoes. If you are really set on this you could consider powergrip straps.

I personally found that on tour I am happier with no platform. I can ride a mile or so to the store with running shoes or even Crocs on even the tiniest spd pedals if I really want to, but when going any distance longer than that I'd rather put on my bike shoes.

My companions on the TA used pedals with platforms on one side and spd on the other. After the trip I asked one if she would pick them again of go with a two sided spd pedal. She said that for a long tour she would probably go all spd if choosing a pedal specifically for the trip, but probably wouldn't bother to change them if she already had one or the other on the bike.

I do like pedals with a platform on one side for running short errands and so on at home. I had them on my folding bike that did duty on a sailboat and found them especially nice for that.