Option 1 - sub out the express editing to an editor to do the express.. the videographer can concentrate on the shoot.
Option 2 ( as mentioned by some) - 1 person shoot first part 7am to 1pm and do the express editing. 2nd person cover the 4pm-10pm Solemnization + dinner.
Did b4 for such timing in Option 1 which i was the editor.. have to admit is very tedious, was rush like hell as the earlier session over shot to 2pm+.. :what: