Campers with young kids, need a new baby monitor

Search ebay for wifi baby monitor or wifi p2p camera. There are cameras that can link directly to your smartphone using wifi, without an Internet connection. Some have two way audio and some even pan/tilt using app on phone.
We have the walkie talkies mentioned and they work, but Video would be great. I have been looking at the wifi cameras to use as a backup camera on the rear of the tt.
4ucam has some on their website.