I'll echo a few other posters. Build a bow bench. aka one board, cut by lumberstore if you don't have a saw, hammer/nails or drill driver and screws, a vise (cheap or expensive the stave doesn't care) secured by lag screws. You are in business.
Safe, cheap, and best of all multi-use. Did I say safe, when you're drawknifing a stave, you want a stable platform. Stiches get expensive quick.
The board doesn't have to be perfect, just outside grade, check the cull pile I always do. Built two bow benches for less than 10 bucks by using cull pile lumber. I already had the screws and the drill driver, but my first one was nailed, yep I had a hammer and nails already.