learn to use a set of flat stones, there are plenty of good ones... Spyderco Ceramics, all the different diamond types, good ole Arkansas stones, Japanese water stones etc....
If you learnt to sharpen knives on flat bench stones you can do what ever you want to the edge, you arent limited in edge type/geometry (other then how the blade was made).
Like Lin I use the Norton Arkansas stone alot on my personal knives, it gives a nice toothy/aggressive edge that holds up well in the field.