Cam is not amazing at stellar navigation. He notices that Orion's not up and that's about it. The reasons he has for thinking this might be Space are unrelated to the stars. The moons are a big fucking hint, though!

"Nice place you've got here," he comments to the nearest large bug.

It flies off.

"If there is something you want me to do or reason you want me to be here, you have thus far not successfully communicated it in any way," he tells the next nearest. "I remain ignorant on this matter. If there is neither communication nor something that looks like it might constitute an attempt at communication in the next few minutes I might just, like, fly away, explore."

Next nearest does not react to this in any way.

He waits for a few minutes, looking at the stars, and the moons. He turns around in place. Any lights on the ground in the distance? Or geography?

There's, call it psamography, there's sand dunes and more sand dunes. The cave he just walked out of doesn't stand out, and it would be extremely easy to lose it amidst the dunes if he walked for three minutes in any direction.

"I'd love to mark this place in some way in case it's important but I can't make anything right now, any chance that could change?"

There's no response for a few seconds, but then a swarm of bugs suddenly fly out of the cave all at once, up into the air, and it...

...forms an arrow pointing down, like in one of those old-timey highway motel billboards, bugs' lights blinking in and out alternatedly and all.

"That constitutes communication! Thanks!" He will... go back down into the cave? (Still very slow and careful.)

Nope, now there's an X of glowing bugs blocking the way, and the arrow becomes an exclamation mark.

"Oh, okay, I took the arrow to be directing me. Are you instead offering that the arrow will stay here for future reference?"

Checkmark symbol.

"For how long?"

The checkmark becomes a punctuation mark that apparently this language has that indicates uncertainty.

"...Okay. Uh, I don't know how long days are on this planet so I can't start proposing amounts of times very well. I'm only even guessing that days are a thing and that we're not tidally locked."

The bugs don't answer.

"Is there anything else we should maybe discuss before I go for a flight?"

X symbol.

"...okay, I'll go for an explore and come back if I see anything I wanna talk about or something?"

Checkmark.

"Okay. It has been fascinating to meet you, thank you for inviting me to your planet."

And he will get some space from the bugs lest they be annoyingly buffeted and take off.

Deserts at night are: fucking cold. Beautiful, picturesque, but really, really cold. 

One noteworthy thing, though, is that there are no plants that he can see. No cacti, no dead shrubbery, nothing at all. Just sand and the occasional rock.

It is really tempting to rain on this place. He should ask the bugs if he may pretty please. Maybe it blooms like whoa when it rains.

When he's sufficiently high he can see more desert in all directions. There don't seem to be any kinds of artificial structures nor light sources, other than the stars, the four moons, and the occasional bug. The constellations are definitely moving, though, so if this planet is tidally locked it's year duration is very very short.