Thank You Tim!!! After watching the video, My wife immediately got out the heat gun and using a spoon and blunt knife (no paint scraper handy) she tackled a small area. The test was successful, so we will be working on down the line.
I do not see a viable way to use glue/spray glue or any type as the vinyl seems to almost melt as it is being smoothed back into place. Will have to see how long the repair lasts using this method.
We are living in the camper full time and are keeping the unit comfortable with little humidity. I am hopping this will preventing a recurrence of the wrinkling.
BTW, of all the search terms I used, I never used "wrinkled rv ceiling".