Cardiff Blues coach Dai Young is hoping he will be unable to take charge of the Barbarians for their fixture against England on 29 May.
The Twickenham match is on the same weekend as the Magners League play-off final.
The Baa-Baas also face Wales in June but Young hopes his Blues commitments mean he will miss the England game.
"I'm really keeping my fingers crossed that I miss the first game," admitted Young.
The Barbarians face England on 29 May before providing the opposition for Wales at the Millennium Stadium on 4 June.
Although he is looking forward to his role with the Barbarians, Young insists his priority is with the Blues.
The region are currently fifth in the Magners League with four games remaining before the top four teams compete in the play-offs.
"We've got England the first game [and] if we [Cardiff Blues] get to the final of the play-offs obviously can't do that first game," said Young.
"It would be nice to step in to do the Wales game. It's a thoroughly enjoyable experience, mixing with players you don't normally coach.
"The Barbarians have got a huge tradition.
"We don't have the same intensity and training and same focus as Wales would have. But [it's] still an enjoyable experience for myself."
The Welsh Rugby Union have confirmed that the match at the Millennium Stadium will be full-cap international to mark the body's 130th anniversary fixture.
It will be the third occasion that caps have been awarded by Wales for a fixture against the Barbarians.
Young refused to be drawn on the merit of awarding caps but said that Wales would face strong opposition.
"We'll have an international team out against them," said Young.
"I don't really pick the squad to be honest. They run a few things by me and totally ignore me.
"It always determines where teams are at that stage of the season. That squad will probably change about five times.
"But they certainly want a quality squad and they are very conscious of keeping the reputation of the Barbarians going."