Hi Buel,
I have been taking rc quadcopters, trucks, buggys, planes, wings, and even trains with me or mailed ahead of time for many years.
The best "case" if you are going to be traveling, would be a good hard case that keeps each piece of equipment in its own little spot. Also, you want it to have several locking mechanisms not just one and a spot or spots to provide 1 or 2 locks (I like the rotating number locks that don't require keys), and finally water proofness, if you are going to be on a boat a lot or around water... Now, you can completely water proof your bird so you dont need to ever worry about it,, but you can google that one. I now also use a tiny working GPS in case my case gets jacked or lost, I can find/locate where it is exactly at the press of a button and be ready ahead of time (stretch out or find a good weapon) to get it back or just kindly ask the receptionist at baggage claim that you have a black case about 3 meters from where you are standing and would like it back. The gps units are inexpensive now as to what they used to be and you can buy a single use calling card to activate your GPS for a month.
Now if you are hiking, touring a city, or what have you, a backpack with a hard enclosure that has several velcro tie down straps are awesome. What you want is something that will not allow your stuff to move around and get damaged. The soft bags are good if you are walking out of your car and to a park bench. But if you are really huffin it, don't chance breaking anything cause you will regret it and not be able to get those sweet azz shots. Good luck ? I've gotta go...