Help please. Putting in a 50 amp service at home.

I am using #6 wire. I have spoken to 2 different electricians that I know very well and originally both of them told me that if the camper isn’t 220 then only use a single pole. Neither have experience with an RV outlet. I read online and then talked to them again about what I found and they both said that the camper will be getting 220v. But....I am under the impression now that the camper is wired for this and it will not hurt anything. Thanks for all the replies.