This may be unpopular, but I severely dislike the NFL Combine. I stayed at a hotel in downtown Indy 10 years ago for work that happened to host the Combine guests. The $$$$ thrown around for that week (smoke machines in the lobby, special reflective "NFL Combine" lighting on the floor, etc.) along with seeing ultra stressed out OL in sweatpants in the elevator concerned about their lifting #s for their future earning potential -- it all seemed surreal and wasteful.
A "Rocky IV"-esque evaluation of chopping wood, lifting heavy beams, and running up snowy, wooded hills would suffice.