@janiebill I had 3 bypasses done but not a node transfer. I was released the same day but I went in around 9 am and didn't come out of surgery until 7-8 pm. My surgeon did mention that node transfers usually require a night of observation in the hospital. I believe you'd have drain tubes/bulbs like I did, they were not fun but liveable.
So far I haven't been asked to do any kind of rehab except compression on my right leg where the bypasses were, compression in my groin and abdomen, and to keep both legs elevated as much as possible.