Hi OP so sorry you are disappointed. Can you say what your DD wants to study and what her predicted grades are? People might be able to give you a steer on some better choices.
Tbh I have never heard of Northampton uni an the town is not the most exciting. IME there are unis in dullish places but which are themselves well worth attending (Lboro, Lancaster, Warwick); but there are also unis that are less highly rated but still pretty good, but that are in places that are exciting, busy, interesting - these might suit your DD better?
Under that head I would class Sheffield Hallam, Notts Trent, Leeds Beckett, City of Birmingham, UWE, Uni of Kent. There are others of course.
You don't say where you live tho and I infer that she is looking for somewhere close to home. If Northampton is close bc you are in the south, most of my ideas are a bit unhelpful. Kent is good tho if you are SE.
Btw I wouldn't class a two-hour open day trip as requiring a hotel stay necessarily (tho you may have other reasons for staying over); IME you can see all you need to see in a day from 10-3.