The first column assumes relatively forgiving terrain, where finding a safe campsite is a DC 11 skill check. I recommend just sliding up the unsafe / dangerous scales.
|Survival (d20)||Safety||d6||Feature||d6 + Safety (once for each)||Water||Food||Shelter|
|1 or less||very dangerous (-4)||1||ancient standing stones (2d4*) of (2d4: 2 jade, 3 marble, 4 sandstone, 5 granite, 6 basalt, 7 obsidian, 8 quartz)||0 or less||poisonous or disease-bearing water||poisonous or diseased foods (1d6: 1 berries, 2 grubs, 3 rats, 4 locusts, 5 roots, 6 nuts)||treacherous, in bad weather saves are at a disadvantage|
|2–5||dangerous (-2)||2||a copse of trees (2d4*), they are (2d4: 2 dragon trees, 3 baobabs, 4 acacias, 5 palms, 6 saguaros, 7 flame trees, 8 ebony)||1–2||no water||no food||no shelter|
|6–10||unsafe (-1)||3||an abandoned dwelling of (2d4: 2 fine marble, 3 granite blocks, 4 rough sandstone, 5 bleached planks, 6 adobe, 7 woven thorn and branches, 8 porcelain)||3–4||bad water||poor food (1d6: 1 lost dried rations, 2 tubers, 3 bugs, 4 semi-edible nuts, 5 cacti, 6 lichen)||poor shelter, but passable|
|11–17||safe (-)||4||a water source (2d4: 2 an old pumping station, 3 a secluded gorge and pool, 4 a muddy creek, 5 a herdsman cistern, 6 an animal watering hole, 7 a fine well, 8 a deep cenote with a spiralling staircase)||5–6||good water||good food (1d6: 1 veldt rats or rabbits, 2 nuts, 3 berries, 4 succulent tubers, 5 sweetmeat grubs, 6 frogs)||good shelter, in bad weather, saves are at an advantage|
|18–20||very safe (+1)||5||a cave or hole (2d4: 2 a cracked egg-like structure half buried, 3 an abandoned mine shaft, 4 a natural wind canyon, 5 a cleft in a hill, 6 a dry spring, 7 a crater, 8 a rusted metal vault)||7+||mineral water, +1 hp regained per HD||a feast (1d6: 1 veldt gazelle, 2 yellow cabbage, 3 fish, 4 eggs, 5 fruit, 6 lost tins of spam), enough to replenish rations right here!||fantastic shelter, saves at advantage and soothing, +1 hp regained per HD|
|21–23||serene (+2)||6||a lookout point, the (2d4: 2 top of an abandoned and cracked monolith, 3 crown of a tangled growth of dessicated plants, 4 windswept hilltop, 5 panoramic concealed outcrop, 6 the top of a small mesa, 7 a flat shelf on a cliff face, 8 brow of a giant bone)|
The author of this table is not responsible if your PCs decide to start investigating their campsite instead of following the Magical Railroad!