Take Smidge with you if you want to remain sane. Especially in the Trossachs and Lomond Park.
https://www.smidgeup.com/
Unfortunately [Inchcailloch](https://www.lochlomond-trossachs.org/things-to-do/camping/find-a-campsite/inchcailloch/) is currently closed, but bookmark it for future use.