Great pictures, yeah it would feel pretty unpleasant to see too much garbage for the first time but I guess that's the nature of this; the alter is everything goes in the garbage!
Looks like you have quite a few helpers actually in the green vests, for some reason I was only thinking a handful of people helped you like 4 or 5
Do we get to see pictures of what the fundraiser is for? (I think it's a music festival or something but I may be remembering wrong)
The department of electrics and other technical stuff is just a small part of it, we also have the department of books, music and paintings, the department of kitchen stuff, the cafe, the toys, the clothes, the furniture, and usually also a sports department.
The fundraiser is for musical education for the kids (the school's orchestra - Grorud Skoles Musikkorps). They have to hire one dirigent and one instructor for individual classes, there are also some few other running costs (such as buying instruments), except for that everything is done on a volunteer basis.