Didak was substituted out of Collingwood's semi-final win over West Coast at three-quarter time last Saturday night with calf soreness.
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Dawes was forced from the field in the final quarter of Saturday night's game when several players fell across his knee. He later returned with his knee heavily strapped and played out the game.
Walsh said medical examinations of Didak and Dawes on Sunday suggested they should be fit to play against the Swans.
"I spoke to the doctor yesterday and he was quite positive about how both of the boys had pulled up," Walsh told SEN radio on Monday.
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"I think as the week progresses obviously they'll get better every day.
"It's a six-day turnaround, which is not ideal, but right now, based on yesterday's report from the doc, I think they're both more likely to play than not."
Walsh was dismissive of initial reports that Didak and Dawes were extremely unlikely to play against the Swans.
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"Our doctor thought both of them weren't too bad. I know Dr Peter Larkins had them both in hospital, I think," Walsh said.
Meanwhile, Walsh said Collingwood's players could fly on two separate flights to Sydney this Thursday as the club attempts to juggle its Preliminary Final preparation and players' desire to attend former teammate John McCarthy's funeral in Sorrento at 11.30am on Thursday.
McCarthy died accidentally in Las Vegas last Sunday while on a post-season trip with a group of Port Adelaide teammates.
Walsh said Collingwood would work out the "logistics" of their Preliminary Final preparation on Monday morning and would make sure there was "ample representation" at McCarthy's funeral.
Walsh said those players who attended the funeral would head straight to the Melbourne airport afterwards, so they could arrive in Sydney later that afternoon, or early that evening.
Nick Bowen is a reporter with AFL.com.au. Follow him on Twitter: @AFL_Nick
