For non-drivers, the fastest route from along the Hastings corridor: catch the 160 bus to Maple Ridge and then the 701 at Coquitlam Station; get off at Haney Place Mall and ask someone where the peace park is. From along the Skytrain, on weekends, get to Lougheed Mall, catch the 97 B-line to Coquitlam Station, then once again, grab the 701. Either route takes about an hour and a half, but it's a weekend, so it's only one fare in and one fare out (don't dally).
(By the by, I've done many interviews with the Rebel Spell - check here and here, say. Enough people have now dropped off the map or changed their game or retired or so forth that I can now say the Rebel Spell is my favourite punk band anywhere!).