This film evokes such great memories of warm summer nights at the drive-in. It has one of the greatest character actors who ever lived in Warren Oates, one of the coolest in Peter Fonda and together, they make a great team and have wonderful chemistry in their scenes together. Loretta Swit and Lara Parker are both good at making coffee in the RV and are very believable as the wives and boy can they scream!! Jack Starrett does a fine job directing, sets up some great, tense moments of suspense (the scene with the rattlesnakes is harrowing!!) and puts some first-rate car chase scenes and stunts into the mix, as well. It is also far more believable, plotwise, than the vast majority of horror films that have been made since. And they did it without the gratuitous blood and gore so common now. The most chilling aspect of this film's many villains is that they are not indestructible, unkillable monsters, but are very ordinary and human. They and the many everyday, normal settings both take on a cold, eerie quality, even in the brightest daylight. It also pays homage to the era in which was made. Imagine getting excited these days about having a microwave oven in an RV!! It doesn't make any efforts to be anything more than what it is, but the film is meant to be enjoyed as a thrill-show, like a rollercoaster. You care about the two vacationing couples, you cheer them on as they run for their lives, you despise the villains and you hate the abrupt, shock ending. All-in-all, this film delivers what it promises and is a satisfying story. Forget what the eggheaded film critics like Leonard Maltin have to say about it and just enjoy yourself.