The Surrey One side take on Seaford at Garrett Green on Saturday in the London final of the RFU Junior Vase (kick off 2.30pm), and the victors will be one victory away from the home of rugby.
O’Keeffe said: “There’s a good vibe in the camp right now. We’ve been concentrating on the cup, trying a few different combinations in the league recently and resting a few players who will be back on Saturday.
“We’re quite well matched with Seaford, we’re both burly sides so I would expect a ferocious opening 10 minutes and then it is a case of who comes out on top.
"Seaford were battered by Brighton II in their league last weekend, but they beat the leaders of our league [Old Tiffinians] in the last round of the Vase, so chances are they are concentrating on the cup, just like us.
"They are sixth in their table, we are fourth, so I can see it being an even contest.”
He added: "Our Vase games have been getting closer and closer as the competition has gone on.
"In the fourth round we beat West Norfolk 17-7, and in the last round we squeezed past Newmarket 10-7 - so everything is pointing towards a very close game."
Ironsides will be without Elliott Milnes (broken nose and Rob Phillips (dislocated shoulder).