okbottledepot, I, too, am unsure of what your exact question is.
I use Streets & Trips to schedule my trips and then use a Nuvi 785 to navigate. For example, I completed a recent trip from Denver to Dallas/Fort Worth. The applicable data is:
12 days (4 days travel)
107 stops (Average ~14 a day)
2,343 miles
I could, of course, export the resulting "route" as a GPX file and import it directly into the Nuvi but since this is a one-of trip it would be too time-consuming to delete each of the entries in the Nuvi after use.
In fact, the only problem I have has to do with the "Report" that Streets & Trips produces:
25 pages (including "Summary Statistics")
My "problem' is that only 58 of the 107 stops are included in the "Route Segment Details" portion -- apparently that section of the report is restricted to a single page for some unknown reason.
I could, perhaps, be more helpful if I knew exactly what you are looking for.