The ground is at the end of an industrial estate and is miles away from the town centre. Even then, the train station is the 'other side' of High Wycombe. Will you definitely take a train back to London? If you could take a coach, then you could try to get to Handy Cross roundabout (just off the M40 J4) as the coach stop is there. Also, there aren't may drinking opportunities near the ground.