I felt the same way about comments about they knowing someone that snapped back quickly. I would come back and say that my knee was different than theirs and had, had a lot more work done to it. They couldn't rebut that. Just tell them the same thing and tell them, for what all you had done, your OS says you're doing great!
I remember the Sunday before my replacement that was on that following Thursday, a fellow Sunday School member said that her husband had a horrible time after his replacement. That in therapy they put a big ice pack on his knee that was straddling between two chairs and then sat on his knee. I had all these horrible things running through my mind and actually had to run to the bathroom and throw up. What earthly good did that woman do for me by saying that. Of course, it was a fib, but I was already petrified when she said that!
Shortly after my surgery, I learned that if I just smiled and nodded my head when asked if I was doing all my exercises, that, that silenced them.
I'm not sure you're going to be ready for an outing in July. That will be less than a month out from your second surgery. Leave it open that you might have to back out.