I live in the middle of nowhere, but was surprised to find that I have exactly 200 within 50 miles of my home coordinates. It helps that I am smack dab in between two bigger cities (Toledo, OH and Cleveland, OH). If I head either east or west an hour or so, I should have a pretty good cache density to work with.
Also, I'm really close to Michigan and Canada, so my search would include those. If the 10 closest to my home coordinates, two of them are on an island that isn't readily accessible when the lake is frozen, and one of them is in Canada, which would take about 20 minutes by boat. Again, with the lake frozen, the options are limited.
Since I am relatively new to all of this, 200 in 50 miles plus two nearby major cities should last me awhile. I have friends in both cities, so I even have non-geocaching excuses!