I don't have a "decorations" story, but I kind of have a District Convention experience I guess?
Early 80's. My family would attend District Conventions at the old Capital Centre in Landover, Maryland. This is because my father couldn't stand going to the old Veteran's Stadium in Philly. It was hotter than hell and miserable. The Capital Centre was inside and air conditioned. Unbeknownst to a very young me, it also was the venue for many a historic basketball game, hockey, concerts, and even Presidential Inaugurations. (1980's)
It also had a claim to a couple very unique features:
1. Upon driving up on it, it kind of looked like a "nest" or something. The roof was curved in. It was just a sight to see.
2. It had the first "Telscreen", a 4-sided center-hung projection screen + scoreboard. Had the first sports replay as well.
The screen meant that loooong before the 2010's projecting of GB Members and dramas onto large venue screens, we had this back in the early 80's. A cameraman would zoom right in on the podium or on the dramas, and anyone from any seat could easily see and hear the events by watching this huge screen.
4. Fun story: Once during a lunch break as a kid of 4-6, I somehow managed to get access up to the top of that Jumbo-Tron, and was running around up there!
5. I found out just a few years ago that "The Who's" music video for the song "Eminence Front" was filmed at the Capital Centre during rehearsals for a concert there.
What I wouldn't have done to have been there for those basketball, hockey, and concerts during the 1980's instead of being bored to tears at stupid JW District Conventions. Ugh!
The Who video:
Eminence Front