Cam is very fortunate. But if this research project looks like it will take more than a couple days he's going to take a break to go for a malaria-eradicating shuttle ride.

Depends on how exquisitely careful he wants to be about not having to feed Ben Franklin basement-dwellers. The low-hanging fruit can all be gathered within the first couple of days but the point of diminishing returns is not a point of no returns.

"Hey guys," Cam says after he's been at it for nine cups of coffee, "this is gonna take long enough that I don't want to wait to eradicate malaria until it's finished. Will you be okay without me for a few hours while I go place lots of mosquitoes?"

"I'm good," Lucy says, absorbed in her algebra curriculum. 

"We'll be fine," Wilbur agrees, taking notes on his computer as he pores over the Necronomicon. 

"Cool. Here are some snacks in case either of you get hungry." He makes an insanely large bag of trail mix.

"Thanks!" A "hand"ful of granola flies out of the bag and disappears. 

"If you need me back early, write 'letter to Cam' on a note and I'll get it next time I check my mail." Cam makes a smaller less obtrusive shuttle and heads Earthward.

While cruising over Africa releasing infertile mosquitos, he may observe an inhabited area with a temple in an odd architectural style, with spiral pillars and a giant statue in front of a not-quite-human woman. 

...he will fly a bit lower over this area.

The people living nearby seem not quite human in roughly the same way, somewhere between a gorilla and a neanderthal in build, and covered in white fur. 

Huh.

He doesn't expect Wilbur and Lucy to have the hang of sending e-mail yet, but he can send them one, he isn't that far away from the station. Found civilization of gorilla-ish people, investigating, let me know if you need me.

Letter to Cam: Good luck. 

Cam lands near the giant statue and gets out.

Various ape-people are circled a respectful distance back from the ship, staring. 

Cam tries some regionally plausible languages, though his African ones are a little sparser than would be ideal and it's plausible they don't speak anything that's spoken on his Earth at all. But maybe he's lucky and they have Arabic or French or something.

They do not have Arabic or French. 

...A few brave souls come forward and try languages. 

Cam's computer thinks one of these might be Bangubangu. He sets up Bangubangu machine translation and says, "Hello, is this intelligible?"

"Yes." 

"It's nice to meet you all, my name is Cam. Is this a good time for a visitor?"

"It's not really a better or worse time than any other for someone to visit from the sky for some reason." 

"I was curious about you! I didn't know you were here."

"I didn't know there were people in the sky!"

"I'm not usually in the sky, I was running an errand that's easiest if I'm flying around."

"What errand?"