Gaymer the only difference is 1 added letter and it still makes it tacky. Vacation they change it more to fit gay into it. Both are tacky ways to get Gay on it when its not even needed.
When I go on a vacation I don't need to say I'm going on a gay vacation and when I'm playing videogames I do not need to say my sexual orientation cause that is not relevant when I'm playing a game. As for Gaycation I get the point is to make the documentary obvious that is about traveling to different locations to talk about LGBT issues/rights and its "quicker" or "easier" to say than Gay Vacations and in a way tacky or not it somewhat leaves an impression more than saying Gay Vacation. The name Gaycation sounds like another sequel "Not Another Gay Movie" tbh.
Still both tacky but I don't see how one is better or worse than the other in this case. Gaycation as tacky as the name might be the content which is the thing that matters is good and I doubt the name alone will stop people from watching it.
Gays can be as misogynist as straight people so no I dont see how that separates people when you can find the same disgusting people no matter the sexual orientation.