I have made all of ONE multi-day tour, so take this for what it's worth. But that one tour covered 300 miles in five days. This was on lightly loaded race bikes, riding in Provence. We could have physically covered 500 miles in that time, but why? We started early, finished by five-to-six every day, and stopped many times along the way. The country was alluring, the people fascinating, and the bike nothing more than a canoe to float me along through this flowing river of humanity. Just as I wouldn't paddle furiously to make an extra 20 miles a day on the river, I had no desire to peddle furiously to "make good time" on the Provencal byways.

Cheers!