I was about to mention the gas protection working, but you beat me to it. In stead, I will tell you my loadout, equipment, then my stats for Cabin Fever.
Gunplay: SG556 Mrk II w/ xtend mag I and ITECH scope
M21E
MG36
M2 Browning OR MP7 MOD (Extend clip II on the MP7)
Desert Eagle SE or USP for my secondary
Mines (stack em JUST toward the garage by the basement stairs EVERY round. they WILL kill the blue guy instantly, just don't have a line of sight to it)
OR the HE frag
Equipment: Light Vest
Kepi (hat)
Chemical Gas Mask (60% gas protection)
Stats; Kills: 13,492
Death: 192 (~70 kills per death)
HS%: 33.13%
Combo: 27 (NO spec weapons)
As I stated, mines CAN be of use. I put mine to the right of the small stack of boards to the left of the basement door and lay at LEAST 3 down EVERY round. The Big Blue Giant will be instantly killed if you lay 3 more about 3 ft in front of the basement door before round 11 starts. Just MAKE SURE TO GET TO COVER! After round 11, start throwing mines OVER the door of the gate blocking the upstairs path (I stand about 3 feet back and aim about 2 inches above the gate, then jump+throw the mines). Again, after round 15, place 3 mines about 3 ft from the doorway, they will ALL go off and take every zombie with them, making it easy to get the Golden DB Punisher (16) and the L96 Black Magnum (11) EARLY in those rounds.