I'm leaving on my cross country tomorrow, and have run into a question regarding the route of flight for a VFR flight plan. AIM states that the route of flight should be designated using navaids and airways. I'm flying from Corpus to Pecos, TX, to Sedona, AZ for my day visual navigation hops. Especially out in west Texas, there are few Victor airways, and they don't coincide with the route planned for the VNAV hops. Is it appropriate to use airports (or even towns) to designate the route of flight, or must it be only airways and navaids?