Like ibake said, it will still be major surgery and will be a long recovery. Long term, though, I do believe that the levels they're talking about for you now are easier than the lower levels. When you have L5-S1 involved, you're probably going to have pain with sitting for any length of time. When I was fused from T4 to L4, sitting was never painful. It was always a relief. Now that I'm fused the rest of the way down, sitting is difficult and I have to get up and move around frequently and lie down several times a day. Granted, I have a very long fusion, and mine was for different reasons, but my therapist told me that "sit pain" is generally a given when L5-S1 are involved.
I hope that's helpful. If you decide to go ahead with surgery, come back and ask all your questions. You're sure to have lots of them, and we're here and happy to help from our own experiences.
Blessings,
Emily