This campaign actually began because the store that I run D&D Encounters in did not receive materials for the season of The Crystal Caves. So to fill the gap, I ran a conversion of The Hidden Shrine of Tamoachan for 4e 1st level characters.
We ended up continuing the campaign when the next season arrived. So, I run Encounters at 5 PM and 6 PM, and then from 7-9 I run Blackmoor.
As time has gone on, I’ve tried more and more to let the players steer the whole campaign. I also try to run it Chris Perkins-style, where we do one big encounter per session.