Short answer... YES.. the longer answer depends on how the generator is wired internally,
Generators used in RV's come in one of at least 3 configurations
Some are actually 120/240 volt generators, IF yours is like this than a volt meter will show 240 volt AC if hooked black to red If this is the case I'd put in a 50 amp outlet and use a dogbone when needed.
Some are 120 twice, in phase. this means that black to red will read zero, but either of those to white will be 120 volts.
Some are designed to have a seperate power line for a 2nd air conditoner.. These can be a might confusing.
