Thank you for letting me know about your opinion on a group walking the camino. Certainly we won't be doing anything that you described as reserving beds such way or any other public resting places. I have walked by myself and another time with few friends and no matter who we encounter, I believe respecting others is an important element of the camino. So, that's what we will do as a group.
Also, I believe everyone has different reason to be on Camino and has a place on it whether as a solo walker or as a group. I don't think you can generalize saying that solo walking has advantage over group or vice versa. Everyone has their reason and we need to respect that. Yes, groups can be noisy, but so is single walker or camino family you form along the way, when people do not respect others.
If your mind is set to dislike groups you will always have problem with them, but if you are open to them, who knows, you may realize that not all the groups are the same just like no individual you encounter on the camino and life is the same.