Winnebago Vista handling

I'll reiterate my post on toe-in. A rear wheel drive vehicle tends to 'spread' the front wheels going down the road due to forward thrust from the rear drive. Most rear wheel drive vehicles are adjusted to slight toe in to counteract any slop in the tie rod ends (front wheel drive vehicles are usually set to 0 degrees toe in since they do not produce that spreading force). Incorrect adjustment or worn tie rod ends will yield a toe-out condition that make constant steering corrections necessary. Alignment is something that very few mechanics seem to be good at. If you get an alignment and the vehicle still seems 'darty', make the mechanic drive it then have him increase the toe in a little. That's the most likely cause of poor handling truck chassis.