Hi there
Try the Rose Revived at Newbridge (where the river is crossed by the A415 Witney-Abingdon road)
If you're going towards Oxford, the well known Trout Inn at Godstow (as seen on Inspector Morse etc). Mooring available between the lock and the ruined Abbey, and if it is too busy there, you're only a 15 minute walk back along the river to the Perch (not good for mooring along that stretch though).
All of these will be busy around lunchtime so best pitch up early to get moored nearby.
The bridge at Godstow can be a bit tight, so watch the paintwork, especially after a few pints of Speckled Hen!
Have a good one, all this talk of beer/pubs has made me thirsty, and I'm on Standby till 11pm!!!!