Here is what they use in Alaska for remote weather stations. The stations are about 5ft by 4 ft by 6 ft tall, and you can hear fans whirring inside and see the satellite antenna outside, all inside a chain-link fence with a warning sign. And not a power line in sight.
http://large.stanford.edu/courses/2013/ph241/jiang1/
It is also described in Wikipedia: https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator
NASA also uses them in space probes, most notably Cassini. They design the hot cells to be able to survive reentry even if everything else burns.