@Broch I don't think I'd waste my time trying to shoot squirrels with a sling shot. I'm not anywhere near as accurate enough. I'd snare them I think... I think they're too small a yield of energy to be worth the effort of hunting them. They're not like the porky buggers seen in town parks in the uk .
I'm not sure to be honest. You can get 5 or 6 squirrel at the bait at a time and they don't care when one is shot, returning within half an hour. In a hide you could be as close as 10m away. I've had a great deal of success culling them using a basic break-barrel this way. A bit of prior practice and I reckon you could be pretty sure of a kill most times. At 10m you wouldn't need to over-stretch the band and, if you ran out of shot you could use some of those rounded pebbles that are on the shore.
Snaring would be good as well in as much as you can get on with other stuff such as the fishing. The squirrel, as you say, is not a big meal but would be a nice alternative to pike
I was impressed with some of the shelters; I'm not sure I would be building one to the quality of some on there. One of the ladies had a raised fire at her entrance I think; throw some pine twigs on that to create a flame and I think her shelter was pretty bear proof.
I've not watched the end yet but I know whom I'm putting my money on