Moving a burning pack seems overkill and unnecessarily hazardous. Rather than moving the fire to containment, it'd be a lot safer and easier to move containment

Moving a burning pack seems overkill and unnecessarily hazardous. Rather than moving the fire to containment, it'd be a lot safer and easier to move containment to the fire. All you'd need is a few fireproof walls stored on site which can be moved into place when needed.