This is much easier than SCUBA gear or guns. Due to TSA regulations, golf clubs cannot be carried on but must be checked. First you need to buy a hard-shell carrying case for your clubs. Yes, we are aware that most airlines will rent you a case, but that assumes that they have one available on the days and locations that you are departing and that it is in good condition. You spent a lot for your clubs, so spend a little to properly protect them. Second you should expect to pay an Excess Baggage Fee if you have too much stuff. For a summary of the airlines rules, see The World of Golf website.