Hickory really likes to absorb moisture so keep this in mind as you work with it.
I have made a number of Hickory backed all-wood laminated bows. One of my favorite wood combinations is: Hickory backing, Black Walnut Core and a Black Cherry belly. Now, all of the above woods are readily available in the upper Midwest where I live so I go to the local Lumber Liquidators. I believe that Osage is commonly found throughout Texas. Osage is one of the great bowyer woods that can be used alone or in combination with others. Again, if you are working with "board lumber" go to your nearest cabinet or flooring wood sawyers / suppliers for materials.