There are two basic problems with a dryer outlet. as many RVers have found out.
First they are 240 volt. not 120/240 (though they may have a light weight 120 volt ability) if the outlet is a 3-wire outlet there is no safety ground. and though many have Jumpered to provide neutral/ground bonding at the outelt THIS IS DANGEROUS and should not be done.
The other issue si the neutral may not be up to FULL POWER 50 amps (or whatever it's fused at) and if your RV's inverter was installed by the idiot who installed mine (THey put both Air Conditioners on teh same leg when they moved breakers around) that could get kind of hot and here comes the fire department.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times