It had the potential to be a good film but was let down on a few technical aspects.
1. He shouldn't have used too many hand held shots.
2. Should have used film stock rather than electronic. Poor colour separation.
3. Far, far too many close up shots. If you are going to make a 'road film' then its a good idea to see the characters within a location. There were just not enough. Okay, one could argue that he tried to convey a feeling of claustrophobia but we don't need the entire film to tell us it's claustrophobic inside a camper. Surely if it was mad hot they would all want to be outside on every opportunity?
4. The kissing young couple. Sorry but very basic and primitive. It would have been better for them to be seen sneaking off into the woods then we could use our own imagination.
5. The dialogue with non members of the family with other people were few are far between. The only worthwhile example I can recall was the police roadblock and the man with a spare gasket.
There are too many 'road movies' and to stand out from the rest you really do need to be original - this wasn't.
And lastly, I thought it could have been improved with a large injection of humour or real pathos.