When I go on out of state/country on jobs, bringing larger light stands and a good tripod have been difficult. The great bags made by Manfrotto is just not protective and large enough. I love the Manfrotto bag for smaller set ups locally, it just don't pull it off for me and air travel.
Another thing is the abuse luggage can take with high drops etc in the airports luggage systems. So then I used a ski bag and now even better a HARD CASE golf case. The airports are always happy with ski bags and golf cases, anything else odd I'm not so sure. I was looking at my son Stevens golf case which he use for flying to golf one day, and thought....that should work perfectly!
I the golf case I can have a good camera tripod and couple of light stands and umbrellas. I can also fit my California-Sunbounce Mini & Sun Swatter . It fits well when taken a part even the rod for the swatter. Then I usually trow in some shoes that I rather have there then in my suitcase making clothes wrinkly.
PS. And YES it got wheels :-)