Reid's 45th-minute try set Glasgow on the way to a historic win in front of a sell-out audience of 10,000, the vast majority of whom were supporting the hosts, and the prop explained that their support had meant a great deal to the players on the pitch.
"It was absolutely amazing to be out there with all those fans," Reid said. "The atmosphere was incredible. At the end, the boys were running on empty, but the crowd just gave them that extra lift they needed, the extra bit they needed to make the tackle or get to the breakdown or carry the ball. We need that every time.
"The crowd is always good here, but they gave us that bit extra tonight. That extra noise makes a big difference."
The Warriors players and fans will know later today who they will meet in the final in two weeks' time, as Leinster and Ulster clash in the second semi-final in Dublin. If Ulster win, Glasgow will have home advantage in the final as the higher finisher in the regular season.
Scotstoun would have to have temporary stands brought in as PRO12 rules call for a capacity of at least 18,000. Ibrox and Rugby Park have been touted as possible alternative venues for a final, and Celtic Park has emerged as another possible contender in the past few days.
The Warriors coach Gregor Townsend also thanked the Scotstoun crowd for their noisy support last night, but most of his praise was directed at his players, who overcame the early setback of Munster opening the scoring with a converted try.
"To be involved in a game like that, where the players put everything in, was fantastic," said the coach, who has now taken Glasgow further than any other Scottish side has gone in the history of Celtic rugby.
"Munster played top-quality rugby, came at us right away and got 7-0 up. It was always going to be very tough, but it was a top-quality match. To get the win is fantastic.
"Munster have been in these situations for the past 15 years. When they get ahead it is very difficult to get it back. We had to keep our discipline when we got one point ahead. In a game like that a penalty could have cost us, but the effort in defence was outstanding."
Townsend admitted his players had been drained by their efforts, but expressed relief that they now have a two-week break. "If it had been a final next week it would have been very difficult to get the bodies back out there," he said. "The performances of all 23 were superb and some of the subs made massive contributions."