Ok, well if you want an all mtn board with clean graphics check out these two.Jones Mtn Twinhttp://jonessnowboards.com/index.php/product/overview/moutain-twinArbor Elementhttp://arborcollective.com/snow/boards/view/412884/element-rxIf you can last seasons you should be able to get both for under $400.
Honestly, go for last seasons Burton custom. It has most of the tech and is all mtn. If you don't want to "sell out" to corporate, I'd go with a past season Capita Black Snowboard of Death or a Lib Tech Attack Banana.
I've heard good things about them. How experienced are you in the back country? Jackson Hole is no fkn joke. A guy died and another critically injured when I visited last March.
Keep your fingers crossed that you'll have enough snow.