Not to get to graphic, but the various uses of the restroom are handled as follows:
- Urination - If there is no obvious answer I just improvise. Finding an unobtrusive spot is not usually a problem. If you find it unacceptable to go on the ground where you are you could use a bottle and dispose of it later in a suitable location, but I have never felt the need to bother with that.
- Defecation - I usually need to do this after I am on the road so it seldom a problem for me during impromptu camping. The majority of the time I find indoor facilities in the morning.
- Washing up - If there is a shower or sink available I use them, but a quick wipe down with a damp cloth suffices when they are not.
- Teeth - I can get by with a few ounces of water to rinse after brushing.