i did just that. sort of.
18-month tour of nz and oz.
front+rear bags, and bob trailer.
had everything for hiking (including heavy duty hiking boots!)
except for backpack.
for a few tracks in tazzie and many in nz, would check into a
hostel, store the bike, and rent a backpack for a week.

one of you could ditch your rear bags, load your stuff into
the backpack, carried in the trailer with the unladen one.