DS1 did six open days and a campus tour with an appointment to speak to an academic afterwards (UEA). DH snd I split the trips between us as we had younger DD and DS2 to look after.
Ditched one on the day (Sussex) and Leicester also didn't make the cut, but more in a, well, if I could apply to 6, it would be in, sort of way - nothing to do with fears re cleaners' designs on his property / body. Got offers from all five, at which point, DH and I swapped and he went along to the offer holder days where I had been to the open day and vice versa.
DD looked at loads of places, either on her own (taster day at Greenwich, just for the sake of a day off school, really) or with me tagging along, since DH now didn't have the time and anyway was less keen on mini holidays spent traipsing around university campuses and random towns an cities. I made him go with her to the Leeds offer holder day, though, because he'd never been to Leeds.We dragged DS2 along to a few, mainly to get him out of his bedroom. Being a 2021 entrant, his own open day schedule was curtailed, but by then, he had seen Birmingham(yes), Exeter (no), Sussex (yes) KCL (no) Leeds (maybe) and UEA (Fell in love on the spot🙂). He has just finished a very enjoyable first year at UEA.
I actually loved traipsing off to the various universities and cities that all 3 have looked at, although my general plan was to push the actual applicant off to their activities and toddle off to find a coffee / gallery / nice walk round the vicinity, if possible giving any 'talks for parents' a wide berth after the first one or two.