Hiding requires an opposed roll. Can a sleeping character hide at all? If they do so, do they roll Hide when they go to sleep (for hiding their sleeping spot, etc.), or do they make an opposed roll ...
In both Pathfinder and D&D 3.5e, the rules for stealthing (Stealth, Hide and Move Silently) state: When moving at a speed greater than half but less than your normal speed, you take a –5 ...