Maxperson
Morkus from Orkus
It's not all that hard to figure out.There are some decisions about what sort of things the NPCs should do, is it or is it not meta-gaming for them to even be suspicious, do they search for something hidden, why would they do that, and my guess is presumably they don't search, or they find nothing, and they go away. Alternately, maybe they do find something, but I'm not sure exactly what kind of anti-climax ensues in that case. I guess perhaps the Paynims are just defeated by the PC's magic and can't do anything.
For reasons that are now a bit hazy, the PCs wanted to explore Tovag Baragu, the mysterious standing stones in the Baklun desert in the World of Greyhawk. The PCs teleported there, and then used magic to create a great pit that they were using to search for something-or-other that might be there. And then Paynim nomads arrived on the scene. The PCs hid themselves by creating a cover over the pit, which stopped the Baklun riders from finding them.
They are in a desert and have come to these stones. There would be fresh tracks in the area, but none leading away. So the answers to "Is it metagaming for them to be suspicious?" and "Do they search from something hidden?" and "would they even do that?" would be dependent on whether or not they notice the suspicious tracks.
I'm sure Rolemaster had some sort of perception process. Success and the nomads notice the tracks and become suspicious. Then they would search the area, and there's probably a process for noticing the magic or other way to find the PCs.
As for drama, that's up to how the DM describes the above processes and their results.