Nice set-up BooneDog!
I've got the same Cortech luggage, having bought it when I still had my Sprint RS. Haven't mounted the saddlebags on the S3 yet, but I'll try your muffler tape heat-protection technique when I do.
Last October, a buddy and I met up near San Antonio then rode out to Big Bend NP, and for that trip I used only the tail bag and my Cortech 21 liter tank bag, which provided more than enough luggage capacity for the three day outing. Our total mileage was about the same as yours, but spread more evenly over all three days.
The Speed Triple is a better traveling bike than people might think, especially if you keep to the backroads.