Bruce ... Here's one suggestion for you. I rode an In-state SaddleSore in SC in March, 2014. It was a simple, Interstate route, with 7 legs, of lengths from 102 to 194 miles. Started in Dillon, ended in Hardeeville, and passed through the Columbia area several times on a route to various corners of SC.
Google Maps shows the route as 1,059 miles, with a duration of 15:23 (that's riding time only, not including stops).
Here's the GM link:
https://tinyurl.com/McQ-SS1K-SC
Regards ... Dave