I think Beads and EPG are both right. I have the mid-sized Otter hub (Lodge) and it’s advertised as being able to fish up to 5 people. I’ve done it, but it’s miserably cramped and that’s with most of the gear outside and one hole per person. There isn’t a hub out there that will fish 5 people, their gear, and multiple holes in what I’d consider a comfortable fashion.
I don’t know that brand is too important. Just make sure to get a thermal denier fabric for insulation. I’ve heard good things about many brands.