An interesting "pedal wrench" was the now long out of production Park RW-1. It was a flat take-along tool about 6" tong with a 15mm pedal wrench on one end and a 32mm headset wrench on the other. It had holes to mount under a bottle cage if you wished. I bought it when I had a S&S coupled travel bike that required pedal removal for packing. I've never seen the need for super tight pedal installation and it worked fine for this use. The 32mm 1" headset lock nut end was never used but I can see that touring bicyclists might have found it useful BITD.