Old, but when I was 11 we bought an old farmhouse on the other side of the state from where I grew up. The week my dad went out to gut and rebuild the bathroom my parents decided was going to be a family trip. (Why anyone thought it was a good idea to have a man, woman, and three girls in a house for a week with NO bathroom, I have no idea.) We had a Costco-size ravioli can in the wood shed, back room, which had a crooked door you could kind of close. We buried whatever we left in the can. Once a day or every other day we went into town for "coffee," which meant we could use a real toilet. Needless to say, we buried a lot of solid waste anyway. :)
Whenever the power was out at the farmhouse, one of us would have to hike to the creek with a 5 gallon bucket to fill with creek water for flushing the toilet. If the town had a scheduled power outage (for work or something--small town) one of us would fill the bucket the night before.
Whenever we went deer hunting, my dad would set up the "Potty Tent." His parents had one of those ancient beach tents with alternating stripes that people in old movies run into and change in on the beach. He had a wood bench with a rough hole cut in it. The youngest able-bodied "hunter" always got the job of digging the hole under the bench and then filling it in when we packed up. If we were lucky, my dad remembered to bring an old seat so we didn't have to sit on the splintered hole.
Worst non-bathroom bathroom experience for me was having to go desperately on the rocky side of a mountain pass as almost the only girl in a group of backpackers (I was probably 15 or so, most of the guys were younger, too), it was a bad time of the month (why I was backpacking anyway, I have no idea, unless I didn't think that would make a good excuse when I'd planned on the trip for a while), and all I could find was a low scrubby bush that covered what counted.
This will be really funny pretty soon!