i assume there are many things I will adjust to living in my RV so perhaps my view will change. But as a woman travelling alone in my RV, I certainly do not want strangers, especially male strangers showing up at my door anymore than I would have welcomed people driving by my house to just decide it would be OK to just pop in because we had the same house style. And if I notice people stopping often to watch and see if I come out, it would also be a bit unnerving. If I am outside (and haven't fallen asleep in my chair listening to the sounds of the wind and birds), by all means say "Hi" - I don't see that as just a PC thing but a neighborly thing no matter your camping accommodations. When I am out exploring with the dogs, i hope to be able to engage others in conversation. The RV is my home - my place of safety, security and privacy - and the place where I will be trying to concentrate on my remote IS consulting - my workplace and income. When I put myself inside it is because I want or need to be by myself. Folks I have met and become friends with certainly are a different story than folks I have never met.
