I hate to say this, but it might benefit you to join Facebook. Yes, they harvest your data, but you can join with a fake name and birth date. I've found that telling people when I finally meet them that my real name isn't Phoebe3 doesn't seem to be an issue.
You may not be able to
travel with other Bs, but you will get to know people that you can meet up with when you go to various areas of the country.
and if you don't limit yourself to Bs, there are a lot more opportunities for you to get together with others. Here are a few examples:
https://www.facebook.com/coachmenowners/
https://www.facebook.com/search/top/?q=Coachmen Galleria Class B RV
https://www.facebook.com/groups/2204017916595715/
https://www.facebook.com/groups/137363733632399/
https://www.facebook.com/groups/1153104958124978/
The last group, Free BLM and national forest camping is the only one I belong to so I can't vouch for the others, but once you join a group like this, you will get ads along the right side of the page for similar groups to join. It might take a few weeks to find the group that you want to stick with (the moderators have a lot to to with the tone and timbre of the group), but there are so many options out there, I'm sure you can find something.
Best of luck in your travels!