Glad you are enjoying it!
It's working as intended, as The Crater is meant to be a one-off thing and only accessible once per level, but in the next small patch I will be making The Crater accessible during the post-game so you can repeat the activity through the town.
To see the previous duck events, you would need to see them through the memory system. The duck event line hasn't been properly implemented into the memory system yet, but you can see the duck events when replaying the Crater activity as a whole. Just make sure you downloaded the v1.51 hotfix as there was a bug with the Crater memories in v1.5.