I've used the tunnel set-up for years. Seems like the plastic traps (Kness, etc) will jam up in a short time of usage due to dirt in the mechanisms. I used to use the black Kness traps, as they were the strongest ones I could find. Now using the yellow-pan Victors. Good kills, and no worries on dirt preventing proper firing.
Lately I've been using a variation of the stake-down method with fantastic results. I use my garden knife (mole trapping knife) and at the holes with heaviest sign will cut a small angled cut-out (or ramp) at the hole. Cut about a 45 degree angle, same size as the trap base. Make sure to cut a small relief at the top edge for the striker bar clearance. Pin the trap with the 16p nail as usual, right in tight in the hole. A slight bit faster than using the tunnels, even though the possibility exists of catching small birds... which doesn't happen with tunnel covers.
Added another step this summer which has really been successful. Use my landscape sealant and plug all the holes without traps. They don't chew through it, as they go right to the open holes and into the trap. A couple pics:
Clump of dirt at left shows angled section carved out with garden knife. Trap secured with nail through hole drilled in trap.

Holes with best-worn entries have traps, others visible with black landscape sealant.

Results are almost always perfect neck catches on exit.