OK, I'll try again:
The basic choice is between commercial airports with full amenities - where things get to be expensive - and private fields or strips with limited services. If you go to a commercial airport (whether by planning before or for lack of options whilst airborne) and are NOT ripped off, you were just lucky.
Not that I've any experience in this field, I'm just trying to summarise what I read here.
One of the good things about a forum like this is the opportunity to share information about level of service available at what a/d at what cost. We can't have too many postings with this kind of practical information, the more so that everything is on change permanently.