France international Remy scored on his QPR debut in mid-January following an £8m switch from Marseille but has struggled with a groin injury since.
Zamora, meanwhile, has missed much of the campaign with a persistent hip problem - but Redknapp is hopeful both will play some part on Saturday when his rock-bottom Rangers welcome table-topping Manchester United to Loftus Road.
Redknapp said: "We have a pretty fit squad. Remy has trained the last couple of days and looks OK.
"We will have to see how he is and whether he can play. He trained yesterday. It is difficult with groins. We don't want to risk him.
"Bobby might need an operation at the end of the year but the aim is to keep him going for the next 12 games. We are hoping we can get more than half a game from him but we will see how we go."
While Redknapp realises that the Red Devils will provide his side with the stiffest of tests, he remains bullish on the chances of producing a run of form to beat the odds and secure the club's top-flight status.
He added on United: "They don't take their eye off the ball too often. They are looking to win the league and they will worry about Real Madrid 10 days after us.
"It is a big game. We had been on a good run. Last week was the first setback after five games unbeaten.
"They have kept winning and other teams have had bad runs. They have been the only team playing with consistency so it has left them in a great position. I'd be very surprised if they don't win the league from where they are.
"We need to close the gap. We need 20 points at least. Whether that would be enough I don't know but we have to try for that."
"Of course I feel we can do it. If I stop believing everyone does. I still think it is possible with 12 games to go and lost of points to play for. Six points can turn everything around so quickly."