Hi Jakeblues
I liked your op and I have similar sentiments, I have put m4/3 and aps-c away to revisit 35 mm color film for a while.
I just spent 5 weeks through India, Hong Kong, Australia, Korea with a carry on bag and a minimal Ricoh kit of KR-5, Rikenon P Zoom 1:3.4~4.5 35~70 mm macro, XR Rikenon 1:1.4 50 mm and the Rikenon Hood 52 mm. All up weight less the bag is 905 gram, the KR-5 body is 396 gram.
https://www.box.com/s/d7q8zgqtuprkjuqmeicf
I put some shots up in "Ricoh Digital Cameras & Film SLRs" and i will put some more up when the remaining rolls are processed.
Most shots were 35 ~ 50 mm range; I was needing a 28mm wide angle at times.
I see the D800E is 1000 gram body/battery not including lenses and charger, so a 35mm dslr with a lens is going to be around 1500 g.
I would have to leave that spare pair of Khakis at home!
And would I let such a $3000 camera lie around an industrial worksite or take out at night in a pocket or a plastic bag?
My next trip (Thailand, Australia) I could take the Pentax MX, SMC Pentax 1:2 55mm, SMC Pentax 1:2.8 24mm + 52 mm hood for 962 gram.
or perhaps more versatile, the -M lenses:
the Pentax MX, SMC Pentax-M 1:2.8 40mm, SMC Pentax-M 1:2.8 28mm + 49 mm plastic Pentax hood + vivitar 2X teleconverter for 905 gram.
The XR Rikenon 1:1.4 50 mm is really well made, a bright lens to compose.
I find my old SMC Pentax-M 1:2.8 40mm to be a rather good one, even at wide aperture:
https://www.box.com/s/ec1756e7f656e3c15e71