Check your airline policy for baggage, and the cost of extra baggage. If you are carrying it back yourself, you may be able to do that for free. Take old clothes, and leave them behind! Hehehe.
I kept an EC-12 at the hotel in Limerick Ireland for about 3 months and sailed over there. It went back and forth so many times that I got tired of carrying it, and worked out a deal to leave it there. Did the same thing in Nassau when I was down there 3 nights a week.
Even if you had to pay for an extra bag it might come out cheaper than shipping, it's worth a phone call.