If you can have food, bring cleanup supplies and plan to carry your trash out, too or at less ask for a new trash bag and carry the trash to the dumpster. Leave the space spotless so that no one else has to work hard to clean up after you. Then they'll be more likely to welcome you each time if you make it easy for them to host you. I like the idea of making them a thank you quilt -one of those bookshelf quilts would be perfect.