Red Squirrel is OK since Hugh spent some cash and put in new toilet/shower blocks.
It will be reasonably quiet now. It has one advantage over Invercoe in that you can have a fire.
Invercoe is a much nicer site, but you can feel a bit wedged in between the caravans. The facilities are good and the views across the loch are great. It does feel like a “site” though, compared to Red Squirrel’s more “rustic” charms 😉 The owners of Ivercoe are very nice people and really helpful. Not suggesting Hugh at RS isn’t nice, but he does take a bit of getting used to.
I’m not sure how much of a faff it would be for you, but you can park outside Arkverikie Estate and walk down to the enormous beach at Loch Laggan. Pitch up in the sheltered grassy areas just back from the beach and enjoy a whole beach to yourselves. We bivvy there all the time and the estate guys are pretty tolerant of respectful campers. If the weather is good, it could be quite fun to rig up a tarp and just bivvy under the stars?