miki from my experience you should be fine. I was walking about the day after my c-section, basically as soon as they took my catheter out (at 6am damn them!). I threw the flight stockings away after a couple of days as I was walking round plenty, no danger of blood clots.
Try to limit how often you go up and down stairs, for some reason this was exhausting - have nappy changing stuff both downstairs and upstairs.
When I was in the recovery ward there was a really marked difference between people who'd had an elective section (a bit shell shocked, but basically fine), and those who'd had an EMCS (totally exhausted, traumatised etc), and this seemed to translate into how quickly people healed.
I'd assume you will make your brother's wedding, but under no circumstances carry anything, and try to arrange somewhere quiet for you to feed your baby and get away from relatives if it all gets a bit much.
Scar wise, I'm 3.4 years down the line, mine is under my pubic hair line, and I don't even know it's there. I have a slight numbness round it, not unreasonable when you've been cut open!