Thanks folks for your inputs, ideas, comments and advices. Most of them were very helpful. Some others …. No comment.

Just to let you know, I did not leave the luggage in ZRH. I just have taken it as hand luggage all the way to GVA and back. It was finally the easiest and quickest way, as I did not had to pick it up in ZRH in the evening.
I just have occupied a little more room in the overhead bins, which would have been for others, if I would have left it in ZRH. (But that’s not my problem.)