Thanks for the responses so far, guys.
I've been using a product called Boeshield T9, it's a solvent/paraffin wax combo. It comes in a fairly convenient applicator bottle which I think will be ok to haul on the tour, and it does a wee bit of crud flushing. I suspect the crushed limestone of the GAP and C&O dirt will still accumulate fairly rapidly on the drivetrain. We can try water rinsing to remove a bit as well (A garden hose or even water bottle squirts might help. I'd heard in the past to avoid using high pressure water on components to avoid forceing grit into parts - I suspect this was primarily advised for protecting bearings).
I guess the mess of dealing with cleaning is really what I'm was haveing trouble picturing. My past touring, 99.9% improved surfaces, hadn’t presented the need for more than lubricating after at least several hundred miles. My home technique has been SimpleGreen, a bunch of newspaper to keep drippings off the ground and rims/tires, then a last water rinse before disposing newspaper, then lubricating. I'm thinking the plan for this trip will be monitor and lubricate, pick up bottle of SimpleGreen as needed, read newspaper, and have a five bike cleanup when the appropriate time/place is reached.
dkokolo - do you do old,old school melted wax application? Wax stick? Other?
Hondo - also wondered if you had a specific product too recommend. And thanks for pointing out your Youtube , I'll check it out
Thanks again for the help so far - would still like to hear additional suggestions that are out there