I've been following this thread and thinking about Ann, what she's trying to accomplish, the plight of widowed partners, RV'ing with a companion, and the general aspects of Ann's idea.
My overall feelings are that this is a misplaced idea about activities trying to fill the void of a lost partner in it's total conception. There would probably be some value for Ann remaining active while RV'ing but trying to fill the void by enlisting a traveling companion of the opposite sex, probably won't work.
My Mom traveled well into her 80's with various same-sex friends in her Coach. She also had friends that shared her off-shore travels. She stated to me that any romantic interests were long gone. I believe there are organizations for widowed and single folks that are trying to hook up for travel. It may not be on the same playing field that Ann envisions but that would be the best resource, IMO.
If it has to be a man, she is probably not looking for just a traveling companion but trying to fulfill a need that is about the loss of her husband.