We went on the Cascade Brewery tour in February 2010. There were four of us - myself and my partner and my sister and her partner.
You will only get let on the tour of the Brewery if you are wearing long trousers, socks and closed-in shoes - and the tour guides exercise that rule quite vigorously. Even though she went to the trouble of arriving for the tour wearing closed-in shoes, my sister felt pretty embarassed when she had to put on a pair of socks which were pulled out from a box of assorted second-hand clothing that the tour guides keep there. We thought that was a bit unnecessary. Two men participating in the tour were terribly embarassed by having to put on a pair of old trousers from the clothing box because they had turned up to the Brewery in shorts. So if you are going on the tour, make sure you wear the proper clothing so that you're not humiliated in front of the group when you get there.
The tour itself was pretty average - a lot of talking and standing around. The tour guide we had was extremely knowledgeable and quite passionate about beer, but she talked almost a bit too passionately, as if we were all beer fanatics, and even though my partner and my sister's partner are beer lovers, this was lost on us a bit.
After the tour we went to the bar in the restaurant and each handed over our 3 beer tasting tokens and received our 3 free midis of beer. The tasting was kind of lost on me because you can buy each of the beers at the liquor store, it's not as if they are particularly boutique or "special" beers.
After the tasting, we had a meal in the restaurant and this was the highlight of the day. The food was just beautiful (three of us had the beer battered fish and chips and one of us had the pork). The food was to die for. Then after we had finished our meal we went out and walked around the gardens for 20 minutes. The gardens are just superb.
I really wouldn't recommend the tour to just anyone - you really have to be a complete and absolute beer nut to really appreciate the tour. My advice is: go to the Brewery but skip the tour and have a lovely meal of beer battered fish and chips in the restaurant and walk around the gardens.