Assuming you are not travelling some place where you can not get batteries.
Assuming your devices can be charged with Dyna hubs.
Assuming your devices can use batteries or can use a external battery recharging option.
Assuming the difference in drag of Dyna hub or weight of batteries and/or external charger is negligible.

Simple math.
T=How long on Tour?
B=How many batteries needed to recharge devices?
C=Cost per battery?
Ch=charger?
H=cost of hubs and associated gear?

T*B*C vs. H

Practical math example
T= 16 days
B= 4 batteries
C = .4
CH= I already have a charger
Total = $25.60

Hub is not cost effective for me.