Am a big fan of road trip myself.

Your 5 members of family: are they all adults?  If so, a minivan would be best because it usually has 4 comfortable captain chairs.  If it's 2 adults and 3 kids, a car should suffice.

Nissan Quest, post 2011 models, are the most luxurious in minivan category, in my opinion.

What route are you driving?