In a Field Day operation with separate transmitters assigned to specific bands, what type of filter is needed on the receivers to minimize interference?

During a Field Day operation, multiple transmitters and receivers operate simultaneously on different frequency bands in very close physical proximity. This creates a high risk of receivers being overloaded by strong, out-of-band signals from the other stations. A band-pass filter is the ideal solution because it is designed to let only the frequencies within a specific assigned band pass through to the receiver, while heavily attenuating all frequencies both above and below that band. Using a high-pass or low-pass filter would only protect the receiver from one side of the frequency spectrum, leaving it vulnerable to interference from transmitters on the other side. A band-reject filter would be impractical because you would need one for every other active transmitter on site.