Remember if travelling down to the south coast for this one that BHAFC pay some of your travelling costs whether by train or car.
By train you only need to buy a return ticket to Haywards Heath. From then, if you hold a valid match ticket, the rest of the journey to Falmer (Amex Stadium) via Brighton or Lewes is paid for. You can stop off at Brighton or Lewes for pubs/food.
Alternatively, if travelling by car you can Park and Ride. The car park is free and the bus and back to stadium is free. The three sites are Mill Road, (bottom of A23), Brighton University at Mithras House in Lewes Road, or Racecourse.
Found all this info, plus much more on a site called www.footballcities.co.uk (if mods permit).