Now that I think of it, I can remember one specific time our characters split up.
Goblins were stealing cars and selling them to some local gang. We put a bait car in a parking lot, and the rest of us drove around the gang's area, on the look out.
In this situation, or in many split situations (such as your example of the Smart hero infiltrating and messing with security and all that), the best way we had for keeping everyone involved in RP was with continuous radio contact. It's not hard to get, and is easily concealable.
While we're all cruising, or waiting while the GM makes some rolls to see how well the Smart hero is doing, we all RP over the radios. Works in some situations.
Goblins were stealing cars and selling them to some local gang. We put a bait car in a parking lot, and the rest of us drove around the gang's area, on the look out.
In this situation, or in many split situations (such as your example of the Smart hero infiltrating and messing with security and all that), the best way we had for keeping everyone involved in RP was with continuous radio contact. It's not hard to get, and is easily concealable.
While we're all cruising, or waiting while the GM makes some rolls to see how well the Smart hero is doing, we all RP over the radios. Works in some situations.