I know there is Greyjoy Wildling decks, however I was interested in making a Night's Watch + Wildlings deck.

Is it a fun deck to play in general? Is there any competitive builds out there?

It would have been great before the errata. If you're not aware, you can't use night's watch and wildling agendas together--so I'd say it's not really worth bothering with. Night's Watch obviously can't be used without their agendas as they have no icons, but meanwhile, most wildling chars aren't really worth it without their buffs. Val is Val and potentially more Val since you would have Edd, and you can still splash TWH as a 4-for-8 beater, but that's still more of "Night's Watch with a couple good cards splashed."

Crap.

Thanks man