Tobirama's the first to come find him, some time later. 

"I was wondering if you have a way for two people at a distance to communicate without chakra," he comments once he has Cam's attention.

"Yes. I'd need to put some satellites in orbit or something since there's no infrastructure planetside, but it's doable on tech alone."

"It'd be useful for us to be able to communicate, without relying on chakra flares or any sort of relay. I'd also like to test if illusions can transmit over technological channels. If not, sending me with something would be safer to speak to Itachi - while Sasuke's concern over subversion is valid, I have fought many Uchiha before, and it is unlikely I could be subverted enough Sasuke could not dismiss me."

"You can check technological channels' compatibility with illusion with a local connection. Here, have a computer." Cam hands him a computer.

He takes it and immediately starts fiddling with it. He seems fast on the uptake for how it works.

Once he's figured it out they can set up a video call.

And: 

Illusions do not, in fact, transmit over video nor audio. 

(Tobirama is separately fascinated by the camera.)

"That's convenient except insofar as they're valuable visual aids," remarks Cam.

"There's a few that are technically ninjutsu..."

He changes the structure of his face and the color of his hair, then back. This one does work over video. 

"Yeah, that one I can see."

"I'm not too surprised. It's a solid construct, like the shadow clones. More chakra-intensive and generally harder work than genjutsu, but superior here and in a few other uses. It does mean we cannot simply point cameras at people to ensure they have not disguised themselves, though."

"Alas. I can do identity verification but it's annoying."

"Uzumaki Karin and I, and Uzumaki Mito if we return her as well, should all be difficult to fool, at least."

Cam nods.

"...I'm also uncertain it's safe to hand Orochimaru unlimited knowledge, given what I've heard of him, but I'll bow to Sasuke's expertise there."

"If you feel it necessary to censor stuff we can certainly do this."

"It might be most sensible to start with a smaller library, so he can't simply run off with it. And that smaller library could contain nothing he could use for mass destruction without significant infrastructure and development."

"And then, what, add to it for good behavior over time...?"

"That would be my suggestion."

"Sounds all right to me, I don't know if it'll be appealing to Orochimaru."

"That is one important factor, yes."

"You guys all know him way better than I do, I only have hearsay here."

He shakes his head. "I met him once. Still, I'm familiar with shinobi in general."

"While I'm here - is there anything you would ask of us?"

"Karin suggested I ask you guys for introductory chakra stuff training but she might have been joking, I'm not sure."

"I've had students before. That would be something I'm willing to do, and now that my chakra is unlimited I can maintain clones for reading."