Queanbeyan Kangaroos beat the Queanbeyan Blues in semi-final at Seiffert Oval

He's the Les McIntyre Medallist and hat-trick hero, but will Queanbeyan Kangaroos star playmaker Brent Crisp be back for the Canberra Raiders Cup grand final?

That's the $64,000 question.

Crisp says he won't, Roos coach Aaron Gorrell says he'll drive to Darwin to make sure he is.

But we might not know until the Kangaroos run out for the grand final in two weeks' time, which they booked a ticket to with their emphatic 48-24 victory over crosstown-rivals Queanbeyan Blues in the semi-final at Seiffert Oval on Saturday.

They jumped all over the Blues in the opening half, with Crisp scoring two of his three tries, Gorrell scoring in his 100th game for the Roos, and the visitors taking a 30-4 lead into the break.

The Blues rallied briefly either side of half-time to cut the margin to 16 and give themselves a sniff of hope, but the damage was done.

Will Crisp be there in a fortnight after he heads back to Darwin for work on Tuesday?

"At this stage no. I wish it was a nice pushover boss of the company, but I've put in three leave forms and two have been denied," he said.

"If I'm not here the boys will have a good dig and have a good performance hopefully.

"I even said to them, 'What happens if I blow a shift?' and they go, 'Mate, you've already put in three leave forms so if you blow a shift it's not going to look too good is it'."

Gorrell was having none of it.

"We'll see ... I'm confident he'll be here so. Surely the bloke's got a bit of leniency, but if not we'll just get on with it," he said.

"He's the best player in the comp I think by far. Fingers crossed there's a plane for him. I'll drive up and get him if I have to."

The Blues went into the semi as the favourites on the back of a dominant season, although it did start to stutter in the final two rounds when they went from being undefeated to suffering back-to-back losses.

Now they're fighting to keep their season alive when they face the winner of Sunday's other semi between Yass and Tuggeranong at Kippax.

The Kangaroos split the Blues' defensive line open through the middle far too easily as their whole team had a field day. On the other hand, the Blues struggled to hold on to the ball and gifted possession and field position to their neighbours far too regularly.

Blues coach Terry Campese said they had a week to turn around their last month.

"No one was on to be honest and just waiting for the man next to us to do the job, which obviously you can't against any team in this comp," he said.

"We've been down for the last four weeks, we haven't been ourselves and we've got a week to find it back really. "Obviously you can't get too down on yourself because you have to pick it back up quite quickly.”