He's not fully denying her help, more that he doesn't need what she's offering right at the moment. "So we have the basics at least. Not quite as bad as roughing it, but not living in comfort either." Actually it sounded like they were much closer to the roughing it than in comfort, but Steve was completely okay with that. In fact he preferred it.

There's an eyebrow raised at not being able to stop the things that are out there. It doesn't sound to him she means the other creatures that might live in these woods. That she uses the word allies instead of friends is something Steve notices. It's more tactical and military in thinking than community. "Are their structured alliances established here?"