Finally, what's the most minimalist embark? I suppose you could embark with nothing and survive on vermin and water until the first migrant wave?
Nothing at all, which is only possible if you bring no items or animals and the wagon doesn't exist because it tried to spawn on a slope.
The minimum in most cases is the three pieces of wood from the wagon, plus the two wagon pullers. Those three pieces of wood are enough to rotate workshops until the first caravan is due, at which point you dismantle all three workshops and build a depot with the released wood. Food can be gathered via herbalism or butchering the two free animals (though if you have a breeding pair, or females that can breed from wild animals, you might want to keep them if you don't
need to slaughter them). If you have no surface water you'll need to sacrifice one or two of the logs, make some waterskins to ease the load on the barrel(s), then hope that somebody turns up with a pick or an axe, or that the pack animals that make it onto the map in Autumn have either those or enough building material to make a depot.
You might need to survive on water, but you probably won't need to survive on vermin. Herbalism will eventually bring in some berries, the seeds of which can be planted to get a steady food supply. If you're lucky you'll get some rope reeds, which will kickstart the cloth industry. Depending on the wildlife you might be able to convert a wagon animal or two into bolts and crossbows, so you can get more dead animals for totems, leather, food, and more bolts.
And yes, you can make a training axe and chop down trees with it, but then it's no challenge at all.