@nteaver Hey Nick, Tanzania sounds like an awesome trip!
REI does carry a small selection of both travel adapters and converters. Here's a great article with lots of details on travel & electricity! A travel adapter allows you to plug your device directly into the wall, which is the first step in powering your devices.
Adding a travel converter takes that power and converts the voltage so you don't overwhelm the connection, potentially damaging your electronics. Note that many devices can run on dual voltage, so you will only need a converter if your devices don't have dual-voltage capability.