Cash bar seems like best option for us- but seems to be percieved as tacky

Most of the replied I see on WW talk about how tacky and rude a cash bar is. But hear me out and please let me know if my situation is any different. I am leaning towards having a cash bar but doing either drink ticket/tokens or open bar during cocktail hour. I think cocktail hour would be nice but our cocktail hour will be outside while the bar is inside so idk if that would work. Our venue only charges $3-5 per drink and we will be providing soda, water, lemonade, and tea. First, I cannot afford an open bar, our parents aren't paying for everything and most of our wedding bill will fall on me. Second, there is no Uber, Lyft, or taxis where our venue is and most of our guests will be driving about an hour home and I really do not want anyone drinking and driving.. Third, I would hate to have guests over drink and cause a scene. Fourth, our guests should be there because they love us and want to celebrate with us, not for free booze. Am I wrong in thinking a cash bar will be best for us?