CindyinSD
All will be well, and that will be well is well.
For the most part, deciduous trees (that lose/replace their leaves yearly) grow more slowly and produce denser, slower-burning, higher BTU wood. Most hardwoods are a better choice for heating, for building... better for just about everything, really. They're also much more expensive, so pine (a relatively soft, coniferous wood) gets used a lot. For smoking foods you definitely want hardwood (with a few exceptions, like mesquite).I bought pecan.
Pecan is a deciduous wood, but it should work fine for your fire pit. Just split it down fairly small so you don't have a longer-lasting fire than is wanted. Really, whatever you can get will be fine so long as it's well-seasoned (aka dry).