Hi JWagn, in order to classified a workers as IC you must observe the IRS guidelines, you shall as the questions Who perform the work, what will be done, how it will be done and when it will be done. Also Check the questions the IRS ask in form SS-8, you don`t need to fill this form but the questions can help you about to have a clear idea in classified your workers.
You must provide them the form W9 in order to issue the form 1099 at the end of the year.
if you need more help, feel free to write me.
Manny