Any time that I have flown, a board bag was just considered a bag. I have a pretty big bag and have fit 2 boards, boots, and most of my clothes for a week in the bag. If you're under 50 lbs, then it should be the regular bag rate of 25 bucks or whatever the rate is. I usually throw the bag on my bathroom scale just to be sure I'm good. I've had some attendants let a 65 lb bag slide-on by, and I have had others try to charge me extra for a 52lb bag (that's ok, I'll just take a few things out.)
I thought you traveled somewhere, last year? Where are you heading?
Traveling the States and Taking Pictures