I would empty the tank completely if you are going to move it and place all the LR
in a rubbermaid container and your fish in another. Don't feed the fish a couple of days before unless it is going to be quick.
The Coralife Skimmer is big, no question. I saw a great thread where someone modified it. Basically they attached PVC
and ran the skimmer box to the opposite side of the tank and raised it up. It is much easier on the eye if you modify it. A sump is probably your best bet. I just sold mine on Ebay and bought a Bak Pak 2 because it is much smaller for my 30 gal