Tim, I had a modified radical neck dissection three years ago. My neck looks quite normal. There is a scar but it has faded so much that I forget it is there. Initial numbness of the entire area from ear to jaw receded as nerves regenerated. Today I have very slight shoulder droop on that side, but no impairment in range of motion or strength of arm and shoulder. Improvement will continue over time for at least a year. First few days will involve swelling and drains, but this passes quickly. This is a very, very smart decision on your part.