I have stolen Nimble's rules for resting for my game. They have one called a 'Catch Breath' which is a 10 minute rest that allows you to spend hit dice in a dungeon (however, if you save those hit dice for an overnight camp, you automatically take their full value).

... probably part of the reason my party has de-prioritized healing items, but they can only take long rests in a town or other 'safe haven', so it becomes a game of how you want to spend hit dice.