@Kucinghitam you beat me to the "pass the port" comment. My DD1 is now in her 7th year of study at Cambridge. After her 1st term when she came home for Christmas, she told us that she finally appreciated us drilling into her about starting from the outside set of cutlery in a dinner with several courses but she was most annoyed that we hadn't explained the port rule. That's because we didn't know it.
To the OP, I think most people have covered most things. DD's college has been amazing in many ways. The Master is kind and approachable and keen to ensure that parents feel part of the college "family". However, the college chose DD as unbeknown to any of us, she was put in the pool after interview and picked out by an Admissions Tutor. We met this tutor informally on graduation day and he described DD as "one of his better decisions"!
We went to Cambridge in the summer of year 11 just to get a feel for the place. We used the park & ride bus, got a college map from Tourist Information which is in the street behind Kings Parade, and went to look at as many as possible. The famous colleges right in the centre attract a lot of tourists. Parking near them doesn't really exist whereas at DD's college there was some on-site parking which made dropping off and collecting a lot easier. Before I get flamed, we live in a rural area with atrocious public transport, so going by car was pretty much the only option. It gave us a good feel for the place.
We only went to a proper graduation ceremony in April when DD's BA upgraded to an MA (she also has an MSci) due to Covid restrictions in 2021 when guests were not allowed in the Senate House. Yes, it's all in Latin. Yes, in groups of 4 they had to hold a finger of their Director of Studies, apparently this confers knowledge, then kneel in front of the Master & bow or curtsy afterwards. DD chose to wear a blouse and skirt; but at the gathering of friends & families at DD's house prior to the ceremony, there was the whole array of attire and nobody seemed to mind who wore a dress, trousers or white tie.