What did you use for batting? If it is 100% cotton you can do freezer paper and just iron it on to the top shiny side down and quilt around the paper. Or you can mark with a water soluble marker around your freezer paper template and remove it before quilting. You can use stencil plastic and make templates to trace around with a marking tool. As the quilt is already sandwiched the blue water soluble marker will be the easiest thing to use as you don't need much pressure to make a mark. Buy several as you need to trade off on them regularly so they can "recharge".
You can also use transfer paper like Saral or Transdoodle. These products work like old fasioned carbon paper. You put the transfer on your quilt sandwich (it helps to have a board or hard surface under it), then you place your design on top of that and trace over it with a stylus tool. Make sure you use wax free. Graphite for light fabric, white for dark fabric. Test on a scrap first to make sure it comes out. My experience with transdoodle is that it comes off very easily so you have to mark as you go.