I do a few shows a year , and very quickly figured out that I do not like to take orders for anything. It becomes something I have to do rather than something I want to do.
My advise back down on the projects for others... do stuff you want to do... then after awhile if you feel like it do some but on a limited basis. My guess is you probably aren't making alot of $$$ and people are recognizing the bargain in your work. So just say you are booked up for awhile. Booked up can mean you are booked up with your own projects.