Dave, my advice is...you are the patient , put your needs first. I had the same thing. My mother and sister were all over me..wanted to be around all the time, go to every meeting with doctors, go out to meals, etc. I allowed them to go to important stuff like initial meeting with surgeon and oncologists so that they could ask questions that I may not have been clear enough to think of.
However, I put my foot down when I wanted to be left alone or did not want them around.
My mom is 83 so when I took her to the hospital with me, I often felt that I had to worry about her comfort, hunger, etc...and that was not what I was there for...I was there for MY treatment.
So my advice is be as cordial as you can (Certainly we appreciate their love and help , and close relatives stay steadfast about helping where others , offer, but you may not continue hearing from them) BUT, remember... put yourself, your comfort, your peace of mind and your healing FIRST. When I could, I drove myself to treatments by myself...I just felt better being there alone than having to worry about the comfort of others, and sometimes - I just did not want to be bothered with, or make conversation with anyone.
So be selfish.

Danny G.