The pipe insulation is great - also, it comes already cut down one side so you can just slide it right on. When I travel, I usually:
1) pipe insulation on edges, also on tip and tail.
2) nylon straps to hold pipe insulation in place
3) pack tight in hard case so it doesn't slide around/bang around in there (sportube).
4) ship a week in advance with fedex (seems less likely to get lost/broken/delayed). I have had fairly good luck flying with gear, but even so it's just too stressful for me to deal with gear getting bumped to the next flight due to weight, or lost for a day or two, or whatever. Also, lugging giant boxes or bags through the airport and messing with it is generally a huge pain in the ass, too.
It might even be cheaper shipping than paying for extra bags at the airport now, anyway.