Pack Size/Camino
I concur that 45 liters (~2750 cubic inches) is far too large for the Camino. It is more appropriate for hiking in areas with multiple days between resupply and where one is obliged to carry excessive amounts of food/multiple days, such as stove to heat water to cook the food, pot to cook in, fuel for stove, more toilet paper and other consumables, etc. Actually, about half that 45 liter volume would suffice along the Camino as none of the above is carried.
I have finally settled upon just one pack-a Moonbow Gearskin - weighing 1.50 pounds (0.70 kg) now for the last 4 years and it has no internal volume at all. It is like a long, narrow piece of Spectra cloth with straps along the sides. Gear is placed in silnylon bags, the bags placed upon the Gearskin, the flap is folded over upon the bags and the straps along the sides pulled taunt. It does not require stays as the tautness of the package keeps it up. It has a great hip belt that keeps it riding above the hip bone (iliac crest) where it should be and shoulder straps to keep it in an upright position to my back without flopping.
It is a custom pack made to my dimensions but since I use it a fair amount it was worth it to me. Besides, it is cheaper to use only one pack. On the Appalachian Trail during three season (not winter) with 3-4 day resupply the full pack weighs ~29.50 pounds (13.35 kg).
On the Continental Divide Trail, three season, non-desert, the weight jumps to 37.50 pounds because of the greater distance between resupply, carrying 7-8 days of food, etc.
But on the
Camino Frances, October-November, the full pack weighs just 16.5 pounds (7.5 kg)
The pack will weigh about three pounds or so more upon the VdlP this end-of October to mid-December trip as i will need more water and slightly warmer clothes. I am looking forward to it!