Manager Gary Bowyer has been able to add three fresh faces to his ranks so far and will be hoping there are more to follow before the window closes on September 1.
It is, however, the tying of top marksman Rhodes to a new contract that has helped to raise morale in and around Ewood Park.
The Scotland international is now committed to Rovers until 2019 and Cairney believes the securing of his services will prove to be more important than any transfer deal.
He told the Lancashire Telegraph: "I think it's good for the team and for the club that he's put pen to paper.
"He's scored 50-odd goals in two seasons and when you've got a talisman like that you want to keep him.
"I think I speak on behalf of the boys when I say that we are all very happy he has signed.
"The hardest thing to do in football is score goals and he does it every season for us.
"My first thought is always forward and his first thought is to always look to get in behind a defence or get a goalscoring opportunity.
"So hopefully I will put him through a few times this season."
Cairney is also delighted to have seen long-serving midfielder David Dunn pen a new one-year contract, with the 34-year-old still an important part of Rovers' plans.
He added: "On and off the field his experience is second to none.
"Everyone knows about his ability and I'm sure he'll bring something to the table again this season.
"It's good that we have kept the same faces from last season that helped turn the club around and bring the feel good factor back."