I had to go on a cross-country business trip 5 weeks after surgery, with stops in DC and NYC, where I had to attend a conference and give a talk. My first NSV - I already didn't need a seat belt extender! And although I was exhausted very easily, in between, I felt pretty good.
At 10 weeks out, I had a trip from SF to Paris. I met up with a girlfriend from LA who was undergoing chemo for stage 4 ovarian cancer - she was between rounds. We shared my fancy expense-account hotel room - she with her colostomy bag and me with my gross new DS poop - and except for my 2 day meeting, we spent a week walking a bit, stopping a bit, eating a bit, and generally having an invalid-ish lovely October week in Paris. She felt so good afterwards that when I flew home, she decided to extend her trip and meet another friend in Barcelona. (She died the following summer)
And then 4 weeks after that, I had a meeting in London, and took my husband and we spent about 2.5 weeks in London and environs, with a trip to Edinburgh, and I was doing pretty good by then - certainly better than I had before surgery (when my feet would hurt after 30' of standing or walking). Keep in mind, I was 50 when I had my DS.
So set your mind that by about 2-3 months out, between feeling better with respect to recuperating from surgery, and feeling better from weight loss, you will likely get a sudden rush of DAMN! This thing WORKED!! (YMMV, but that's about the timeline)