Uhmmm.
Well, if you have read the "quick rules" post, you will notice that, with a roleplaying bonus ranging from 2 to 4, plus the bonus from aid-another action of +2 (up to 4 characters if i remember right) you can really aim to very high dcs.
But nevermind, because i'm not going by the book here. Moreover, the DCs vary quite a bit here depending on the skill used. A hint: bluff was not the best.
And finally, it isn't really (or shouldn't be) a hard encounter. For the new players might be a little more difficult, but i'm counting on Garyh and Redclaw, who know the past situation, to put you on the right rail...