Here’s last year’s announcement, it was a little more detailed since there were changes to how the event worked. It has a video from @Jiivita:
Here’s some rambling from me during the event
At the end I felt I had been seeing better drops with AoE so I collected a ton of plants and broke them all at once.
I did have a lot of fun with this event last year. In 2018 I was very new, the event started a few days after I started the game.
I did this too, not just my base but there are a few t1 - 3 planets with massive fields of mud, and a couple of biomes with multiple orb-dropping items. I had a route and if nobody was collecting in the same areas, by the time i worked my way around the first places would be regenerating already