Retractable Roof Pergola. ~ This would also work for a shade curtain for the fire pit. This would be retractable and easily replaced. Run a bar from tree to tree and then use curtain clips to attach whatever fabric we want. Draw it back and forth accordingly.
The Murphy Desk is a great collapsible workstation. The space-saving design hangs from the wall and opens to reveal a small storage area behind the door and a table top when folded down. When closed, the Murphy desk transforms into a chalkboard or corkboard - the choice is up to you. Create a home office when you need to and hide it after you've finished to make room for company.