Yikes that's a sizeable distance! I forget just how large and vast Canada is.
I've been to one, large venue to see Judas Priest. And while that show was super awesome...and I got to see Saxon... (my all time favorite NWOBHM band) I just felt like...a face in a crowd that the people on stage never saw. Seen a few other big time names in medium sized venues, same feeling there.
I like being right up on the stage, directly in front of the bands so I can show my support for what they create. Metal is one of the very few things that I feel comfortable enough around to break out of my shell and interact with people I don't even know.
I really like going to small indoor festivals with lots of bands. There's nothing quite like being on my feet for 8 hours and banging my head xD. I don't think I'd do well at a big one like Wacken though, way too crowded.