Looking forward to the trip and I'm installing a new T5 5-speed into the GT for the occasion. I live in North-Central Arizona, near Sedona. It's about five hour drive from here to Jean, Nevada, and a couple of us plan to caravan up together with our GTs. I'm only planning to do the first few days-- going as far as Tuba City-- then will head back down to Winslow AZ and take back roads home from there. There are some beautiful back roads between Winslow and Camp Verde, Arizona, and that will keep me off the Interstate too.
I've owned my GT since 1973, but this will be the longest trip it's been on since the late 1980's.