Severe winter storms can damage critical components of integrated power-gas distribution systems (IPGS), such as pulling down distribution lines and freezing gas pipelines/sources, causing electricity and gas supply disruptions. Liquefied natural gas (LNG) has a high energy density and can be transported by trailers, hence has great potential in multienergy restoration. This paper studies the application of LNG trailers in the IPGS restoration. The process that the poststorm restoration coordinated with the trailer dispatch and the emergency operation is fully explored. The trailer dispatch is modeled as a finite-state machine; An efficient policy is proposed to dynamically update the real-time dispatch strategy without future knowledge of uncertainties. For the emergency operation of IPGS, storm-induced damages are considered in the modeling. Then, an online framework is proposed to satisfy the need for IPGS restoration with trailers. Compared with the offline method, the proposed framework does not require future information, so is adaptive to environmental uncertainty and easy to implement. Also, the framework solves a dedicated problem involving the observed information in a single period, hence enjoys a high computational efficiency. The simulation results demonstrate the potential of LNG trailers in resilience enhancement and validate the efficiency of the proposed method.