In your latter case, unloading at dispersal for overland recovery would have been a logistical nightmare. It would have been militarily stupid like a Blackadder farce sending troops home for leave during the Christmas truce.
Reverting from a dispersed state was not,
AFAIK, written in BCARs. However BCARs and the accompanying operational documents were brief in the extreme. The operation order for a bomber wing ran to about 34 pages of which 24 were individual target briefs. The SOP was 110 pages including none essentials like preamble, distribution and page check sheets.
Our orders for RTB from a nearby Bolthole was simply come home, bring with you all that you took. It was left to sqns, fits and sections to do the necessary. It was all well practised routine and tempting as may be I am sure we mounted QRA at home and then unloaded at the bolthole.