Larson Gates:
Very possibly if you allow character classes from the "Best of Dragon" Magazine and in particular Volume III
I don't consider Dragon Magazine as canon in my universe, largely because not everyone has access to them, giving some players an unfair advantage. Also the size of the playing group will determine whether I will use all the options from Unearthed Arcana. I find with the older modules, like the ones proposed for this campaign, that things like Weapon Specialization can unbalance the modules dramatically in the players favour.
Considering the challenges for a party in these adventures, as well as the drop out rate for new players, I would want at least 6-8 active players before beginning this campaign. I would accept up to a dozen or more, especially if the bulk are single classed characters.