I got one of these, or something very similar if you're curious.
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I also didn't hydrate myself well enough so I needed to take several breaks to avoid heat exhaustion. In hindsight I would've brought a sports drink.
I've heard of people bringing plushies, and I've seen people pull out latex unicorn masks at the end when they play "the unicorn invasion of dundee", so ultimately, just do what feels fun to you. It's a Christopher Bowes show. Everyone there is a moderately more responsible child. They check their fucks at the coat room and then have a silly wholesome party
I spent a day of my vacation to learn using Wonderdraft to create this custom Map of Scotland with locations mentioned in Gloryhammers songs. If you are interested in the source file to take your own spin on it (there is quite a bit of room for improvement) feel free to pm me :-).
Also heres a custom Google Maps Map.
I found this, Don't know if it helps