Looks excellent and the offline caching likely very useful for those in a rush when they turn up at the wrong venue and need to hot foot it elsewhere. Any chance of some attribution on the map?
Myself and friends use dog poo bags, I'm unsure of their techniques but I tear one open and place on ground to give a decent target, pop used paper on my feces then pickup by the corners to drop it all in another bag. Tie it up then drop it inside a empty large foil crisp packet to help avoid piercing. It can then easily be carried out with any other rubbish