IMOC we bought RttToEE, and although we have yet to get to the actual temple, we use it as a good backstory for our other adventures. IE:
Start in Duvic's Pass from the Burning Plague adventure.
Journey to Cormyr so that paladin can become a Purple Dragon Knight.
Arrive in Hommet, which is just outside Cormyr, and enter the abandoned temple thing (the one with the dragon)
Destroy that place, only to return to town and get ambushed by a vampire.
Get level drained, and journey to the next town over, which has a temple of Helm. (pick up new characters along the way for the people who left, or who were killed by the vampire))
The temple agrees to help us if we journey to another part of the evil cult's land, this part full of lycanthropes, to retrieve an artifact for them.
One partymember gets werebearinized, one gets captured and werewolfinized, and another barly esacepes alive. Return to temple of Helm to get fully healed, and maybe cured, but probably have to take up another quest...
and on and on...
and even though we only made it through the first 30 pages of the book, we still think its a good deal.