We do it at home all the time: short term in the driveway from the garden shed where I put in a 30A outlet fed from a 15Amp breaker so I can avoid the 30 to 15 dogbone. Up where we store the rig we go from 50 to 30 dogbone and then 30 to 15 dogbone to an outlet on the well pumphouse. This outlet is fed from the same shed (different 15A circuit) with a few hundred feet of #8 cable. There is a lot of voltage drop when drawing much current but we only use it to keep the batteries charged and one mild winter it was OK with a 10 Amp electric fan forced heater. (Voltage down to just under 110.)
Keep within the load limits and no long thin extension cords. Watch the voltage.
