I Get it all in writing. An oral contract isn't worth the paper it's written on. Avoid future problems. It's not that you don't trust the people you are dealing with now, it's that you don't know who you will be dealing with later. Write out the process.
Deals are about more than just dollars.
You need to spell out how work gets done. The things you can't or won't give up. Contracts don't have to be legalese. Contracts can't protect you from everything. Live and learn.