or perhaps the occasional outlander, since ashlanders don't seem to like them
They've never attack an unarmed traveller if they didn't break clan laws or customs.
There is concept art of them pulling netches to the ground with harpoons and ropes
I'd imagine they do this with the silt striders you see around the Ashlands, as well. There's no other way they could hit the ground without going to either side.
And maybe they go on long hunting trips at a time, set up camp and maybe a little bit of foraging while they're at it
They go on long hunting trips, as that's stated when you ask the women of the Zainab Tribe about trade goods with the Telvanni. But I doubt they set up camp, as there's no need if you're fast and can cook what you find over lava. And they wouldn't need to leave their camp to go foraging, as there's usually a lot of plants around their camps that look like they can be eaten.