I don't have a map for this encounter. If you really need one, it will take me a bit of time to make it and it will be very rough.
The green is grassland and the brownish-yellow is the road. The gray is the dropoff into the chasm.I thought the green was a steep drop down, and yellow is a bridge of sorts?
Regardless, Tuck will shoot bolts at the closest spider. I'll roll when I know Tim is in his line of fire; if so, Tuck'll choose the next spider instead.