CMo,
I've had a few grafts following my original treatment, with donor sight from my hip and they were a walk in the park compared to the Mandiblectomy and radiation. Your diagnosis is really good actually,
Here is a link to a study done almost 15 years ago where they tracked 42 patients with a T1N0M0 diagnosis over 70 months.
http://www.ncbi.nlm.nih.gov/pubmed/10226980In clinical follow-up, 6 patients developed local recurrences and 5 patients lymph node metastases. Three patients died of disease.
Where obviously there's no 100% guarantees, I'd say the odds are in your favor, so keep your head up.
E