The Dons are unbeaten in five games since successive defeats against Celtic and Hearts threatened to derail their promising start to the season.
Their run started off with goalless draws against Alloa and St Johnstone, the first followed by a penalty shoot-out win, but they have since beaten Partick and Scottish Premiership leaders Inverness, and thrashed Falkirk 5-0 in the League Cup.
McGinn and Robson could add to the feelgood factor by returning at St Mirren Park on Monday night and Reynolds is determined to keep the run going.
"There is a buzz about the changing room," he said.
"That is four or five good results that we have had on the bounce. It was nice to score some goals. We have been playing well in games but not been taking our chances. Everything is now starting to come together, everyone is starting to bond.
"As a defender I am pleased we are keeping clean sheets. Teams are struggling to score against us.
"The fact we have kept five clean sheets in a row means we are getting some recognition for this and it is a talking point. It is great that we have had that level of consistency and teams are finding it hard to score against us."
The centre-back added: "At the other end it is good everyone is chipping in with goals and we are not just relying on one player.
"Last season if Niall did not score we were not winning games. Certainly this year we are creating a lot more chances and we are now taking those chances."