Gordito and I have been planning on around 500 miles per day.

Coming back from KC last year I managed 900 miles in one day... one very long day.

What I found is that it is hard to tell how you will be on any given day. I was exhausted one day after only 254 miles and had to stop for the night. This poses a problem if you are preplanning motel stops along the way.

I think the safest plan is to ride as far as you can and stop... rather than pushing for a destination that is beyond ones endurance in order to make a motel reservation.