You want TWO collections, that's the hurdle.
If you wanted ONE... You could switch off "quick system select" in the ES menu and start ES on the collection. The person wouldn't necessarily see the systems unless they "backed out" of the collection. The system/collection wouldn't change with Left/Right. The person would be able to "back out" with a button though.
I wonder if there was some CFG hack that could make the wording of the systems "blank" and they'd be there, but the people wouldn't know that they could select them. To them it may look like ES is stopping in dead space. (In which case they'd most likely just keep moving left or right.) This is just me thinking out loud. Is this plausible Mitu?