I agree that removing the skull cap on an elk is tough. I have tried several saws. Carrying out the skull plate is much smarter than carrying the whole head, especially when you are also carrying meat. I have also tried the duct tape method listed above ONCE. I have now landed with the Havlon bone saw. It is lightweight and effective. It also reaches into spots a triangular saw can't reach. Havalon Baracuta Folding Bone Saw 4.375"

A close second is the Gerber EZ Saw - IF - you grind off that stop on the end of the blade that prevents reaching deep during the process.