From 9mo until about 2, DS screamed blue murder.
He was an early walker and that's all he wanted to do. We slinged him until he hot too heavy and wiggly - he nearly fell right out of the back of the Ergobaby 

He is now 3yo. I haven't carried him for well over a year as I have a bad back. DH, until recently, would carry him and then complain about having a sore back, I just told him to refuse, and after a couple of times DS stopped asking.
He has the pushchair now if we're doing a long activity (eg zoo), or having a long day where we know he'll be tired.
But I still remember him screaming blue murder from his pushchair and straining to get out with a furious red face! Ah, those were the days!