I know it would be hard in the RV but couldn't you make a sort of road trip, stop at places of interest on the way, take pictures of Gwen in these places and then document your whole journey, have a map of your route, put some of this thread in it. You could call it something like 'Gwen's Homecoming'. When she is older and understands, she will realise how much she was loved by so many people, and it would be a great source of memories for years to come.
I hope you figure something out and get that wonderful daughter of yours home safe and sound.