In version 0.4 only the camping field trip will be available. I have some cool plans to revamp field trips yet again that should make them a lot more interesting and a lot more fun! Once I'm done with that, the farm will return alongside a new camping field trip.
This means that if you'd like to keep a version of the game where it's still playable, I'd suggest backing up a copy of the current version! This is possible no matter where you bought the game from, even Steam (Just open the game's options and click Manage > Browse local files).
Quick note about the Baldi's Basics Plus 0.4 update! Due to a mixture of changes I made and old hacky programming, the farm minigame broke and since I have plans to replace it in the future, I decided to scrap it now instead of spending time fixing it only to remove it later.
