In comparison, here's the key components of my kit...

from Top to bottom:

sleeping bag (and down vest)
thermarest neo air
integral designs sil tarp
bivy with mosquito netting
banana for size comparison

I am in awe you can get that on the bike with no racks.

The bags you make are key to the operation to make it work well. People could do similar getting a big front bag, or running a Carridice as a front bag- i think Nun has done that in the past.