If you guys are referring to HMX-1 they are CH-46E "Sea Knights" they are USMC aircraft Not Army aircraft. CH-46's are a bit smaller than CH-47's.
I'm not sure if they take the VH-3D's on the road or not, I think they use the VH-60 "whitehawks" on the road.
"Because the VH-60N folds easily for loading into an Air Force C-5 Galaxy or a C-17 Globemaster III it is ideal for overseas assignments. The Marines can prepare a VH-60N for a C-5 load in less than two hours."
Source: Wikipedia. http://en.wikipedia.org/wiki/HMX-1#Aircraft