I have a path that also serves to direct water away from my home. I used #9 gravel to create the grade I needed, and have laid large flagstones as steppers along the path (Each one approx. 24-30" irregular shape about 4-5" apart along the 38"-wide path with a clear avenue (about 6") for water on one side; stones laid level but 'stepping' down about 1/2 to 1" as they go down the path.) The question is, what is a good rock to use betwen the flagstones (to create a safer walking path)? I was thinking crushed & washed #6, but afraid the crushed stones will end up 'clogging' the avenue for water to drain. I'm thinking I should use a rounded stone (not pea gravel), but maybe debris will fill the gaps anyway(?) Thanks.