I had the exact same issue, as I got well and truly fed up of crawling around on the floor! I searched and searched for some bulldog clips that would fit onto the edge of my table, but got nowhere! In the end I got some tablecloth clips, which are designed to help keep a tablecloth on a table outside in the wind! They were really cheap (maybe about a pound for 4) and keep the layers in place just enough. They also don't get in the way as I travel around the table (I had borrowed some clamps from my dad's garage and knocked into them every time I passed them!). They are really easy to put on and take off again so I'd definitely recommend them!