W hether you love sleeping under the stars or only do so under duress, a decent camping mattress will at least help ensure you are well-rested and better equipped to handle the wider thrills and spills of outdoor living. The days when your only choice was between a foam roll mat or a leaky airbed and foot pump are long gone. From self-inflating mattresses to lightweight sleeping pads and insulated airbeds, the comfort and portability of sleeping mats have dramatically improved. But with so many types of camping mattresses available, costing from tens to hundreds of pounds, it can be difficult to know where to start. To save you the sleepless night of an ill-informed choice, I tested 27 and shortlisted the best camping mattresses for various scenarios.…