Roger, If you are in Haverhill MA, take a ride up 125 and start to look at what's available in a good used coach or 5th wheel. In your profile you mention that 4 of you will be traveling together. That means 4 in a crew cab and a 5th wheel or 4 in a class C or class A. In the 5th wheel you are more likely to have 2 beds, one in the bedroom and the other being a couch that makes into a bed. A class A would be similar in accommodations while a C may not have the couch but would a bed above the drivers seat.
Gas or diesell will make the trip. We've driven both round trip, coast to coast. Also once you'very looked at a few and think you're close to see decision, rent one and take it out for a few days. Taking an RV trip sounds great, but it'seems not for everyone. Good luck in your endeavor.
