Isn't there a lab that will do 24 hours processing there? The only way to be really sure is, as said, to shoot a roll and then see what happens to it.

There is another option instead of servicing them yourself and finding out later that you didn't do it right: tape them. A bit inconvenient but I'd rather carry tape and get everything wrapped up than get dozens of rolls with light leaks. As we know the entire universe is indeed held together with tape...