Yes, I initially thought I'd try to just do carry-on. Then I talked to my dad, who travels back and forth to Europe several times a year for biking, hiking and skiing trips. He definitely doesn't care what he wears, and is one of those "bring two pairs of underwear and wash one every night" kind of guys. He said no way could I do carry-on for a bike trip, plus a week in Florence (where we're going out for a few expensive dinners, so I want to look presentable). So I've given up that idea! I am bringing a couple pairs pants, a couple pairs shorts, 4 or 5 t shirts, long sleeve shirt, sweater, jacket, 3 biking jerseys, 3 biking shorts, sneakers, sandals, bike shoes, clipless pedals, helmet, camelbak, cycling windbreaker and rain jacket...plus some. I'm just hoping I can fit it all into one size up from a carry-on! My dad and his globe-hopping gf both said to get a wheeled duffel for a trip like this. Anyway, it's not like we'll be carrying the luggage onto and off trains all the time. Getting it from the van to the room shouldn't be too big a deal. But believe me, I am obsessing about it, too.