Rip Rap Along Ditch

Hello- Long time lurker, first time poster...

I have a fairly long driveway that has some "V" ditches along the sides in places. The ditches are mostly clay with rock at some parts in the bottom. I'm going to get some rip-rap to line the ditches for erosion control. I was also thinking about putting in a 4" drain line at the bottom of the ditch and covering it with the rip-rap. Would this be overkill or a good idea?

Thanks for any advice.