Well, with only 2 days to go and needing nearly 200 Springberries with a minimal drop rate, I have no doubt that I will be unable to complete this event successfully. There might be a possibility if the Crop Boost works with the Wild Berry bushes, but I really doubt that will succeed. Short of players suddenly flooding the marketplace with Springberries (not likely), there's no way to accumulate enough of them in the remaining time. Besides which, at this point I don't think there's enough time to craft everything before the end of the event. I'll keep trying, but I'm not very optimistic.
I try to stay positive for these events, but in all honesty, the level of difficulty in completing them is turning them into very user-unfriendly experiences.