Adventures will definitely reward us with resources and the amount depends on the type of Adventure that we embark on. For example the above is a Legendary Adventure which rewards us with the highest amount of resource.
We can make the Adventure to reward us with a bit more resource by using these equipments that I recently randomly obtained from chests after attacking Slavers' camps.
Fill those two slots with those blings will ya!
Tadaa... more resources ready when you have completed this Adventure.