Hello, Help Requested!

A couple years ago I started watching Supernatural and loved it. So I invited my Dad to watch and now he is the BIGGEST fan. I'm pretty sure Supernatural and wrestling is all he watches. He likes to see where they go and take selfies in the locations they are supposed to be at in the show. He had an aneurysm in November and was in Seattle in ICU for a while. He ended up posting selfies of him watching Supernatural in his hospital room. Without knowing it they gave him a lot to do and look foward to. Anyway I really want to take him to the convention in Vancouver and get his picture with Jensen, Jared, and Misha because he's always talked about it. I'm unable to work at the moment so I'm on disability. I'm trying to figure out the logistics but I would also like to send a few letters but have no idea where to send them. I want to make this a surprise for my dad and somehow I will make it happen. Any help is appreciated. Thanks. ❤