He wrote: "Hey, just got this message from some kids along the road. I'll be down at the rugby fields in Wanaka at 8:30am tomorrow.
"If any kids want to come down and chuck a rugby ball around and help me with my training they are welcome."
2015 was a huge year for Smith, who got married, had a baby daughter, won a Super rugby title and won a World Cup.
Following the win, he was able to have some downtime with wife Katie and 10-month-old daughter Annabelle, who journeyed to see him play in the knockout games at the Rugby World Cup.
Smith said that had made everything a bit easier for him to deal with at the climax of the tournament.
"It was a long time away - six to seven weeks before the family got there. It was awesome having them over there, just to get to spend some time with them. I had to change the nappies on my day off.''
Now that the summer break is over, Smith's focus is on leading the Highlanders to another Super Rugby win alongside co-captain Shane Christie.