Slightly grim subject but hey ho! We free camped a bit on our last trip to Spain/Galicia in our old camper. Most areas have some form of loo but not all; and as seasoned as we think we are, hole digging is just grim. We've decided a porta potti thing takes up too much space so thinking bog-in-a-bag. Anyone used one?! This will hopefully get very little use but it'll be handy if needed!!