I am returning to visit Quetzaltenango after 25 years away. (Followed by a visit to Tikal.) We used to carry our stuff in backpacking-type backpacks...old ones that we could throw around and not worry about (with everything inside sealed in zip-lock bags).
We would snicker at tourists with the "modern" rolling suitcases. But now, that's all I have! We're travelling in-country by bus. Old backpacks are hard to come by nowadays. What do you recommend? My son will probably take a duffle bag, but that single-strap is hard on my old neck. We'll be there only 7 days. :(