The 3000 tickets for Aberdeen's trip to Madrid to face Atletico on November 29 go on sale at Pittodrie Stadium on Saturday morning, and fans are planning to brave gale force winds and rain to ensure they snap up a brief.
But the club is to provide all-important portable loos for the shivering supporters, and a burger van will be in place so they can grab some hot grub to ward off the cold.
A Pittodrie spokesman said he is expecting people to start arriving on Friday afternoon, and has arranged for the loos to be in place by then.
He said: "We just don't know how many of the fans are going to queue overnight, but I expect it will be a very large amount.
"We want to put something in place so that they aren't too uncomfortable, particularly with the weather forecast looking grim."
Aberdeen's allocation of 3000 is thought by the club to be "considerably less" than those planning to travel.
The briefs are expected to be snapped up in a matter of hours, and the club is still attempting to secure more from Atletico.
The spokesman continued: "We have plans in place if we do manage to get additional tickets, with those who have queued but didn't get tickets getting numbered slips, but at the moment we just don't know if that will happen.
The Dons European return has created a huge buzz amongst the Aberdeen fans, whwith the travelling support particularly relishing the prospect of a trip to Madrid.
The spokesman added: "We are looking at a sell-out tomorrow and everyone and their dog is talking about travelling to Madrid.
"I think if everyone who says they are going turns out to be going there will be no one left in Aberdeen on the night!"