"Maybe we should go into camp every game," Barrett joked.
Manly are making the most of their opportunities in tough away fixtures and showing they can compete with the NRL's heavyweights in the process.
"They enjoy spending time together," Barrett said.
"We can prepare well without any distractions when we are all together in a bit of a controlled environment. It works for us."
With the help of the crossbar, Sea Eagles centre Dylan Walker silenced a hostile crowd of mostly Raiders fans by slotting a 40-metre penalty goal in the first period of extra time.
The 22-year-old's heroics lifted Manly into the top eight but they won't be there at the end of the round if other results go against them.
"It was a huge effort to win down here (in Canberra) and a much-needed two points that keeps us in the mix," Barrett said.
They face another away test against South Sydney at Allianz Stadium on Friday night.
Of more concern is their 1-4 home record, one they won't get a chance to improve any time soon with their next fixture at Lottoland not until June 4, coincidentally against the Raiders.