I can put in a lot more hours and have a lot more fun by keeping off the superslab. 200-300 miles on the interstate is terrible, boring, and exhausting, whereas 300-400 miles on backroads may take twice as long, but is my idea of a good time.
On average, when I'm doing a major trip (usually east coast to midwest; sometimes north or south along the seaboard), I plan on 350-400 miles a day, with no more than about 100 of that on interstate. That usually requires about a 10 hour day. The most I've done is four of those days consecutively, and it is always a blast. If you have easy stopovers along the way (friends at point X, family at point Y), then it's even easier. Ride 2 or 3 days, stop for a day to socialize, and then hit it again. Pretty much the best way to spend time!
