Your question requires more data to answer completely. However, in short, it all depends! Wire size, length, and electrical load all combine to determine the maximum safe load and distance combination.
Is your Airstream equipped with a 50 Amp cord so it can support dual air conditioners running simultaneously? Typically you won’t need that much power during the cooler seasons unless your AC unit is also a heat pump which you can use at temps above 40 degrees instead of the furnace. Your choice of appliance use will dictate the maximum amperage draw.
"Good judgement comes from experience. Experience comes from bad judgement."
Air #48582, S/SO #003, WBCCI #4584