I have been hunting elk for a few years now using black powder. I prefer inline muzzleloaders because they are easy to use and very similar to using a centerfire. I have shot flintlock before and was not a fan of the delay after pulling the trigger.
If you are interested in an inline muzzleloader I swear by Thompson Center .50 cal. I have shot the standard blue barrel with black stock up to their Bone Collector edition and they all shoot awesome right out of the box. If you want to go shooting let me know and we will take it out. I can show you all the accessories and powder I prefer.
If you look on Thompson's website they should have a video that show a couple of hunts as well as proper use and care of a muzzleloader. When I bought mine it came with a DVD of the video.