Good question, Giok.

BROADSTAIRS:

Probably camping for a few days. For this I'll take the car with instruments and tent and assorted clothes/junk etc.

For extra days as a "day visitor", I'll probably take the train, with or without melodeon.

Cost by car: £8 - £9 on fuel.
Cost by train: (With Network Railcard): £10 (minimum charge) on weekdays, £7 - £8 at the weekend (+possible bus fare to the station, depending on weather).


TENTERDEN:

Last year I went by car as the camp site was out of town. This year I only had time to go for the day. As the camp site is back in the town now, I may go by bus next year.

Cost by car: £8 on fuel
Cost by bus: (Two "Rover tickets"): About £11

OXFORD:

I went by train last year. As a steward, I was given free indoor camping (therefore, no tent!).

Next year, I'll probably do the same. The bus services in Oxford appear, in my limited experience, to be very good. They are frequent and they run late.

Cost by car: £24 on fuel
Cost by train and bus: Unknown but definitely more than £24, even with railcard.


ROCHESTER SWEEPS:

I go by foot and train or bus and train.

Cost by car: £3 on fuel + parking
Cost by train: Approx £4 (plus £1.50 if including bus fare) + a possible £4 for taxi (depending on weather/level of inebriation etc.!).

TOWERSEY:

I went by car last year and may well do the same next year. I'm not sure of the public transport options. I didn't see any buses when I was there.

Cost by car: £20 in fuel
Cost by public transport: Unknown but definitely a lot more than £20.


If it were easier to get information on rail fares, I could have been a little more informative, but they are not easy to find.

My rough and ready calculations are based on one person travelling. It's likely that I'll be travelling with other people to at least some of the festivals; in theses cases, travelling by car would obviously be a lot cheaper.

I hope this has been of some help. I'll be interested to see other people's info.