My friend Fuzzy, a bachelor who sometimes traveled with our family, taught me a lesson about opinions and how to travel when you are with a group.
If you have a strong opinion about where to go, what you want to see, how long to stay somewhere, or where to stay, then state it. Be prepared to hear other equally strong opinions. But do not sit humbly and frustratingly by, silent, when the group is skipping something that is important to you.
On the other hand, if you have an opinion about everything, then find the grace to keep some of those opinions to yourself and let others have their way occasionally. There is a difference in being honest and being high maintenance.
There are good and decent and smart people who chime in on every decision. They/we need to learn how to shut up. Be quiet. Listen. Your brilliant ideas, while magnificent, may not be exactly what needs to happen next. Let someone else have a turn. Do you have to be the lead decision-maker about every restaurant? About when to take a potty break? About what time to wake up in the morning?
Group travel requires compromise. My grandson wanted to eat the most popular dish in Peru, Guinea Pig, so we went to a restaurant that served Guinea Pig. It was fine, kinda like eating quail in South Carolina.