I have always been one to take my own gear when heading out West. However this year with most airlines charging for bags I figured it was going to cost about $200 in extra fees to get mine and my wife's sticks out West. Doing research I found I could rent in Truckee ( I am going to Squaw) for a less than $200. Pretty sure I can cram 3 days of ski gear in my carry on roller bag and backpack.
Almost all the airlines I fly charge $25 per checked bag, each way. The combination of {ski bag and boot bag} counts the same as one suitcase (that said, I never check boots, only skis). So, figure $25 per person each way, for $100 total round trip. Based on my experience shipping skis, that will probably be about the same.
Shipping is definitely less of a hassle, but you do lose some freedom/flexibility packing your gear the night before -- I always wait to the last minute to decide which skis to bring along on the trip.