FWIW - when I flew down to Florida last week, I put my Jarvis 148, my pump and my impact vest into a Burton snowboard bag (166).
On the way down, I was asked "Is there a snowboard in the bag?" and I was able to answer "Yes" because I had but my daughter's board in there. On the way back, no questions asked. No charge either flight.
Flying to Florida in April with a snowboard... that's not so odd.