so I've been riding my sled for a few years now and I'm getting better and better. I live in Alaska and riding my sled in the winter is what I dream about all summer. Last year we started really going back into some big places that were truly the "Back country" and a couple times I really thought "wow, this is big country where anything could happen, and I'm not to sure I know what to look for or what to do to avoid an avalanche or even what to do in-case I'm ever caught in the situation". So in addition to taking an avalanche class this fall I've also decided to invest the money into some gear. I have seen the AVA-LUNGs but don't exactly know how they work, I also really like the results of the back pack that has the inflatable air bladder that keeps you on top of the slide mostly. So my question is this.....what should I get?. I'd like to have both the ava-lung AND the inflatable pack, does anyone do both?. Is there 1 pack that offers both the lung AND the air bladder? Thanks for any info. If you could only pick one then which would it be, the lung or the inflatable pack?