There is also MikeWh's site for oyster:
http://www.oyster-rail.org.uk/
Thank you for the response, by the sounds of it 3 seperate tickets would be better, apart from visiting Charlton I will be mostly be doing the whole tourist thing, possibly checking out different football grounds...
I will be there over Cup Final weekend, where is the best places to avoid for a big event like that, I Imagine the Mainline Stations(Kings X, Euston, Paddington, Waterloo etc)...
Wembley Park (Metropolitan Line), Wembley Central (Bakerloo, LO and you'll probably get enhanced LM services)
The Mainline stations are best avoided until about 2pm and then from 5 to 7ish at a guess.
Quick Question, sorry if I should know this, what is Station Bashing, sounds like fighting at different stations to me, so what is the definition of it?
My apologies, I should define my terms. Bashing is going round stations/lines to check them off a list. Tube challengers would bash stations although if you're going on FA Cup Final weekend it may devolve into fighting