Reliable localization of firefighters, especially in indoor and GPS-denied environments, remains a persistent challenge. Personal Dead Reckoning (PDR), powered by wearable inertial sensors, presents a viable solution but relies on resilient communication to transmit real-time position data to coordination centers. This paper examines the feasibility of using LoRa-based mesh networks as an infrastructure-free communication solution for wearable PDR systems in firefighting scenarios. We evaluate the performance of Meshtastic LoRa mesh nodes through controlled range tests and a live multi-floor residential firefighting exercise. Results indicate that LoRa mesh networks can meet the data needs of wearable PDR systems in most operational contexts, with minimal infrastructure and setup. We also propose practical deployment strategies, including firetruck-node integration and repeater placement, demonstrating that many building types can be covered with minimal effort. These findings support the development of robust, infrastructure-independent systems for on-body localization and mission-critical communication.