Where we camp seasonally has propane refill, but it is expensive: $25 for 20lb, $35 for 30lb. There are plenty of places that exchange 20lb tanks for $16 - $17, but there are plenty of places that refill as well. We usually take our tanks to the RV Dealer we bought our MH and TT from. This summer they were the cheapest place around. What would have cost $70 from the campground, cost $54.
In the past 12 years that we have lived here, there have been 3 places that I can get propane refill within a few miles of the house. We lost one of those places a few years ago because the place went out of business. Perhaps it is a local trend where you live, but not where we live or where we camp seasonally.
-Michael