I have been using the Bike Friday trailer system with Brompton, see this
thread. The essential issue is in deciding with how many pieces of luggage you are going to fly and how are you going to regroup the luggage upon landing. Is the trailer going to serve as a container for bike when flying? Is any piece of luggage going to serve as a trailer bed or are you going to carry a dedicated bed that serves no other function. Multifunction items tend to work better in travel.