My favorite ruler is for SID and it's called the Itty Bitty by Off the Edge Quilting. They have gone out of business, but you might be able to find this ruler in Paducah. I have seen it from other vendors. Someone suggested prewound bobbins. I personally do not like them, but other quilters do. My favorite marking pen is the purple air erase and for dark favorite, I like the pounce powder. Don't overload on any one thing. I have quite a few stencils, but never seem to have the correct size. I have gotten the most use out of longarm quilting design books. One of my favorites is "Hooked on Feathers" which I found to be an easier way to do freehand feathering. If you're in the market for some pantographs, I like Urban Elementz. They will probably have a booth, but if not you can buy online. My suggestion for pantos when you start is to stick to the simpler ones. The more intricate are, of course, harder and were intimidating to me at the beginning. I can do them now without any problem. Buy what you like, but you will find that you won't use all the things you have. That is why you should take it slow at the beginning until you have narrowed down your preferences.