Treborth campsite - on mainland between the two bridges roundabouts. opposite Teborth garden centre and the University sport grounds and gardens down the lane.
Otherwise straight road basically with nice views for the walk to Upper Bangor. 30 miins walk if slow. 5 minutes cycle ride 
Menai Bridge just round corner or roundabout, walk over old bridge and a few pubs - and a Waitrose for all these rich students 
There are places to stay in Menai if you ge too wet camping.