you will understand why the attitude when you come up and see the way some of the visitors conduct themselves, they dont do it on there own marsh i know thru experience.
anyway i'll give you abit of advice, sorry for the hastyness but please dont let me down.
you will need a minimum of a 12 bore 3 inch although the 20 might come in handy for ducks on an evening. do some travelling and reconasience you wont learn by hope alone.