Me and a mate did a Polaris in the Lakes. Got to the campsite at the end of the first day, realised we hadn't got any poles or pegs. A nearby pair fortunately had accidentally packed a broken pole for their tent along with its replacement, so we managed to shorten that. The remaining poles and pegs we fashioned out of sticks, worked out ok.
A later Polaris when I was solo, I was trying out a balloon bed. This is a mattress made up of long cells into which you insert those long balloons you make animals from. Weighs as much as a hankie but laughably unreliable, and I do mean laughably. As people were settling down for the night you could hear popping all over the campsite. I popped three out of six; just as quiet was descending I popped another and let out an involuntary 'SON OF A BITCH!' which got the whole campsite laughing, having been struggling with their own. I managed to have a reasonable night's sleep (for a Polaris) on my front with the balloons under my core.