Members of Wessex will get access to DF to a certain degree.
What it comes down to is the amount of beta-spots we're given.
All the "Beta-Clans" have around 12 preliminary spots each right now, This is likely to grow as beta is announced and since we're one of the biggest clans around we might get a lot more spots if they need the clan system tested thorough.
This being said, Theres no guaranty that everyone will get to try the game.