The reward for this quest seems out of whack compared to, say, Narrow Tunnels or Rat Barricade. While it gives 25% more XP roughly, it gives no actual treasure rewards. Compared to the Rat Barricade which usually gives 100-200 gold and the Narrow Tunnels, where even an unlucky trip should garner 100 gold.
I highly suggest either, Beetle Loot! or giving the Queen a treasure to drop or protect.
Perhaps even, a "Treasure Room" where her strongest, nastiest beetle stands guard over a treasure that is pretty neat, slightly random--like the Mean Rat quest but as an optional addition for extra risk.