Just be careful with summer heat. A friend did something similar, before the first summer was over they'd all fallen off. The glue is designed to work in a house where 'high temperature' is likely still in the 80's. In an RV closed up, especially if the sun is shining on the backside of that wall, the temperatures can be well above that.
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).