We took a trip in middle of June with our toddler. We came back to about 6-8 weeks of pure hell with nap and bedtime. It was so miserable. I feel for you. It’s going to be hard month ahead if you want the toddler of out your bed.
I wish I had advice for you but I cosleep and still do. I think the way my family did it in the past is they laid them in a regular toddler bed and then laid now near them, read stories, and sang calming songs then rested with them until they were asleep. Keep your same prior routine and that should give them a sense of what is coming.