Book your charter bus way before time! Renting a bus for a group trip is the smart thing to do unless you don't mind spending a lot of time getting lost, getting on the wrong train, arguing with cab drivers, etc. from experience, I can tell you that it's best to rent a comfortable charter bus where you can rest in between visits and chit chat with your friends or family about the previous stop. It will make your traveling experience a much more comfortable one. And remember to book a charter bus well ahead of time. Usually, I would confirm everything with the bus company, like, a month or two before scheduled time but I guess booking the bus a week before the holiday is fine too how to find best apartment rental in Barcelona.
One thing about traveling in a group is this....it's difficult when everyone wants to go to different places at the same time! Before the group trip, just write down a list of places that you want to visit....each person should have a list. One person be in charge and organize the trip. I always end up being the 'leader' (slave is more the word) of a group trip and I know it is hard work but hey, someone's got to do it. Worse comes to worse, if no one wants to take up the job, ask the charter bus rental company if they have someone suitable for the job. This way, no one argues.
