"DPH" -- ROFLOL!!!
I personally like the numbered wag bag-linked to the permit idea, which has been mentioned more than once in these discussions over the months. It shouldn't be too difficult to implement.
As for backwash smell, my recollection of using these was that not only do they contain an effective smell-absorbing cat-litter-like substance (which allows for multiple uses of the same bag incidentally), but also that the plastic bags seal well enough (and the plastic is thick enough) so that the smell doesn't get out. Even assuming it did get out, I'm pretty sure the odor would quickly dissipate in the dry mountain air and would be be limited to possibly the first couple of feet behind the hiker carrying it, and unless another hiker was continuously tailgating the allegedly odiferous bag at very close range without either falling back out of "smell range" or just passing the hiker carrying the bag, then lack of common sense would seem to prevail at that point.
Actually, I would think those MT dayhikers who want to use only modern sanitation facilities would be at high risk in this discussion. Since there are no such facilities on the MT, 22+ sometimes jarring miles over a very full day is a long way to go for most people without the use of any such facilities or without digging a cat-hole or using a wag bag.
CaT
