Is a 34/50 on a double crankset with a 12-36 cassette going to be low enough for loaded up touring ?
People in the Hundreds, ride down the Pacific Coast on tour on all sorts of bikes , those doubles among the choices
1:1 low, a 34:34, Might be OK, If you don't mind walking some really steep hills.
my derailleur touring rig , 13-32 cogs, 110-74 , 50,38,24 ..
24:32 = 1:0.75
now with the cassette hubs, offering 12t cogs, no need for the 52.
you can function with a 48 outer.
Found ,for my longest tour 95" gear, was high enough.
A 50/14 on a 700-35 wheel.
YMMV
a British friend on a SF to SD Cal tour used their TA double.. that was a 50-28.
Freewheel was 13-28. , I think..