You may have to drop the cover to expose the valve. I wouldn't be cutting any holes. The cables are generally 6 feet long so it can be quite a ways from the pull handle. My galley tank valve is near the front axle tire, though i dont have a Cedar Creek. Hope it helps.
*Current: 2005 Ford F350 Crew Cab Dually 6.0 diesel 4x4*
*Retired: 1987 F350 Crew Cab Dually 6.9 turbo diesel
2007 Forest River WildCat 32QBBS