I traveled in a similar situation and I would buy a lot of space saver bags (the ones you can roll and also vacuum suck, NOT just vacuum only! It's rare to be able to get hold of a vacuum on the road, especially one with a hose).
Now the catch is that it will make your bags heavier. However, you can pay the airlines a fee to accept overweight baggage. I think it was like $20 for American Airlines.
In addition, for extra fees you can bring additional luggage.
ALSO note that on an airline, you can have two baggage, a carry-on, PLUS a "personal item." My "personal item" was a messenger bag with my laptop. My carry-on was another piece of luggage with clothes.
In your situation, though, you'd have to pay those extra fees routinely. Use the space saver bags, just make sure you don't exceed the limit.
ALSO - if you are going to be on trains for your tour, the weight limit is less than the airlines and you CAN NOT pay fees as they do not accept overweight luggage.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle