Annette, When indoors I use the bee vac a whole lot more.
Liz, if they are in between floors my preferred option is to go in from above if, there is carpet over plywood, which is often the case in my area. If the floor above is finished I consider going in through the exterior but depending on how far the colony has built into the void space it may not be possible to get everything out going in from the exterior.
I don't particularly like going in through the ceiling as I don't care for honey dripping down on me and besides the home owner is left with a sheetrock repair.
...JP