Should I flip a roasting chicken in lieu of having a rotisserie?
There are two general approaches to making chicken juicy in the oven. The first is to cook a short time at a high temperature. For example, Barbara Kafka's recipe for roast chicken
calls for cooking the chicken at 500 degrees F for less than an hour. 

The second option is to cook at a low temperature for a very long time. This recipe calls for cooking for an hour at 250 degrees F, with a high heat sear at the beginning and end of the time. Even more extreme is this recipe, which cooks at 140 degrees F for 4-6 hours. However, low heat will not give the yummy crisp skin.  

Neither of these requires flipping the chicken. 

However, if you really want the crispiness of the skin, flipping is the way to go. Two recipes from Cooks Illustrated (one and two) both call for high heat and a couple of flips. (As does Barbara Kafka's recipe for cut-up chicken, which I make all the time. Season the chicken, and put in a 500 degree F oven for 10 minutes, flip, 10 more minutes, flip, and 10 or more minutes or until the skin is crispy.)

If you want to go with the classics, Julia Child's recipe for roast chicken from also calls for turning the chicken onto different sides. She also bastes frequently, although the above recipes don't call for it.