Think about your choices, and choose 3 to visit.
Visiting them all imo is a fucking stupid idea

Why travel to places such as Bristol to look at a single university?
Think of it another way, an "open" day is a 'rehearsed' event. Everything is planned and I would imagine most of these open days you were provided with a "schedule".
A school that has shown you what THEY want you to see is not going to help, you will see false and biased information about the schools.
You will also probably be accompanied by current students. Did you know these students are PAID to do what they do? (Yes, this WAS one of my questions when I did an open day visit)
You should also think more about the actual school.
Think of it like this...
Oxford/Cambridge/Imperial, some of the "top" uni's, but WHY are they the top uni's? Are they better teachers, or is it simply because they choose the 'best' students and the 'worst' students go to other unis...
You will more than likely find that if you were to get a teacher from a high level uni and a teacher from a lower level uni, their teaching skills will not be to different, you have the same chance of passing in Oxford as you do in say Brunel.
My advice is go for "convenience".
Take a look at "Canterbury, Kent", it is a student town, it has exactly 365 bars (1 for every night of the year), it has a nightclub run by students for students (and its on campus), now think of THAT for convenience
