I had the PCs find a Royal Engineer Section complete with vehicles all in mid stages of decomposition. It is a lucky thing they never tried the water ine tank trailer.
In the same town near the river, they found a nezt of someone who had been living under a building foundation. They also found several cans of food again, good thing they never tried it, it was contaminated with radioactivity and would have rocked their world.
Its good to be the evil GM