I've used my Bike Friday 'Pocket Rocket' for lots of bicycle camping trips with some days being over 100 miles but averaging under that. Having it fit into a completely normal suitcase is a big plus with the airlines starting to charge exorbitant fees for anything that's oversize or even hints that there's a bicycle inside. I also have the optional trailer frame that lets you tow the suitcase with all your other luggage inside once you've assembled the bike at the airport. [But note that some airport exit roads are decidedly not bike-friendly - at those I just hop on the first hotel courtesy bus I see and then put the bike together after arriving at the hotel.]

I agree with some of the other comments that Bike Friday bikes are a little pricey, but they are a good choice for touring - especially if you want to be able to ride directly to and from the airport.