I was playing with my very good base and pressed "E" to go to sleep and it crashed with and error of loading a campfire or something. I opened the game back up and my inventory was still there but it forced the rest of the world to restart. Is there a way I can get my base back?

There is a backup folder in the local app data folder. Find the newest set of files  from the backup folder and replace them. in the folder above it If it happens again please post the error code here.