Nah. The main point of the tunnels is as an escape route for Sazza. So they need to be linked to the grove.
I just threw a number put there. If 200 feet is too much, maybe 30. Whatever. The point is, wear the circlet, deactivate the statues. Other than that, maybe Dispel magic or, I almost forgot this one, barrels that explode. Now I would believe an exploding barrel could do it, not arrows.
