Since I'm currently at 40k feet, figured this was an appropriate topic. I've done quite a bit of traveling over the years and lugged my 40K models on all sorts of transportation using many different methods. Shoe box, GW cases, Sabol, Battle Foam, etc. All of this has been with mixed success. I expect a few broken bits and carry glue wherever I go (wrapped up well itself-some glue will eat through plastic bags), but no matter how well I pack, it just takes one TSA inspector to ruin my day. They broke a long list of models I had checked in during one trip when they incorrectly reloaded my trays. Anyhow, I noticed that Battle Foam was advertising some upcoming hard cases (I think rebadged Pelican cases) which got me thinking about traveling with firearms. Well, first off this probably precludes most international travel, but maybe there are alternative items that would fall into a similar category. In the US you can travel with unloaded firearms as checked luggage on an airplane (train too I think). They have to be inspected in front of you, and once done, you lock it up with a non-TSA lock. I'm thinking it might be worthwhile to travel with ammunition/firearms in your models case, just to get the inspection done in front of you and know that they can't open your stuff once it's checked. Plus the bags are likely tracked better as lost firearms would require an investigation and possibly interfere with their airport workers' more lucrative iPad theft rings.
If just driving to a local game, I find that the Sabol Battalion case and the Battle Foam 720 case usually do the trick. If I have to carry terrain though, that's likely going in a large box. I try not to carry terrain. For air travel carry on you can get away with the aforementioned cases, but they are pushing it on size and occasionally won't fit in an airplane's overhead.
I have also shipped my models via mail, but not so keen on that. Especially all of them at once as I'd have a breakdown if something happened to them.
So how do you carry/move your gaming stuff around? Any horror stories or great ideas to keep our favorite belongings safe? Preferences for cases?