A couple of tips. I assume you have a good wheelie board bag. I'll let the others discuss packing appropriately.
1) Carry your boots on the plane. They can lose everything else, but without boots you are screwed. Although there is a shop at Northstar that sells Head Stratos boots (Elite Feet). Last time I actually removed one set of bindings from the board and clicked them onto my boots as part of my carry-on. Just screw the whole thing together and click onto your boots. This way the worst you'll need to find is a board to ride (see tahoecarvers folks if you are in a bind - they are very helpful). Boots and bindings are heavy so this also helps minimize checked baggage weight.
2) Curbside check-in. These guys usually don't have scales, and even if they do, a $10 tip will virtually guarantee your heavy bag get on the plane with no over-weight charge. Not only is curbside faster and easier, its the best way I know to avoid the weight nazis. New airline bag restrictions have dropped weight limits dramatically. The overage cost is crazy (that's how they expect to make up for some of the money they are losing). I've never had a problem with a heavy bag getting through curbside check-in. I bring $5 and $10 bills for the guys there and it always works.
Good news: the car rental at Reno airport is only about 100 yards from baggage claim and there are no stairs. Oh, and there's a big Sportmart across the freeway for the stuff you forget. REI in Reno is supposed to be a good place to get tuning done as well. If you need to tune gear yourself, look for a hookup on Tahoecarvers. I know there are people there who have places in Tahoe with tuning equipment (like that Randy guy who got banned from posting on BOL).