Paul you are correct - according to Mayo Clinic Radiation is the number 1 Choice for early treatment.
This is directly from the Mayo Clinic - Because of difficulties in adequate reconstruction, radiation therapy has been the recommended treatment for soft palate cancers. Although advances in reconstructive techniques and prosthetic reconstruction have allowed for more effective surgical resection and rehabilitation for patients with soft palate cancers. Radiation therapy remains the primary treatment modality in many centers.
BruceF