I like knives so am not a replaceable blade guy. A good knife, fixed blade or folding, with a 3-3.5" blade will easily quarter or bone out a deer without sharpening. I've not shot an elk, but have butchered pigs and helped on a cow. For an animal that size the same knife would work well also but may need a touch up. If you want a sharpener, I'd recommend a single sided DMT Diafold or Mini Sharp in fine grit (red). They will do any of the hardest steels and the handle helps you keep your hands away from the business parts. Buy a cheap knife like a Victorinox paring knife to practice on. The paring knife makes a fine bird and trout knife after you're done practicing on it. You'll be surprised how fast you can get an edge back on a knife. A couple minutes (2) would be taking your time.
Shameless plug, but I have a BAC Alpine Hunter for sale in the classified that is very light weight and would do any buck you get without a touch up of the edge. It'd be just the thing for a long trip in and the price is good.
That knife is in hard M4, if you don't like that knife I'd highly recommend M4, S30, S90, and Magnacut among the newer "super steels". Nothing wrong with older standards like ATS 34, CPM 154, D2 or any of the better high carbon steels. The high carbon (non stainless) knives require a bit more care to prevent rusting but have been getting it done for over a century.
Feel free to PM Me if you have any knife questions that I can help with whether you want my knife or not.
Good luck on your hunt.
Frank