Wildcamping is always a lot more interesting than staying on a "safe" campsite with showers, toilets, taps etc. Since you are staying at one of these campsites you could try finding an area that is far away from the facilities to make it seem more remote.
If there is a clean enough stream/river/burn nearby you could encourage the scouts to collect water from there and boil it to make it safe to drink (done this several times when I was in scouts).
Cooking on an open fire is another idea, teach them to construct a fire with support for a pot (IIRC washing up liquid on the bottom of the pot stops it being blackened too much from the fire).
Building shelters/bivys can be a fun team activity, if you are in a forrested area make them team up and find a spot to build their bivy but to keep it as hidden/camouflaged as possible.
One activity we did a lot was building a tower with a triangle base and an inverted triangle on top. Get a platform on top with a rope ladder and make it the 'base' for a wide game when it gets dark. Something like hide and seek where one team needs to get back to the tower without getting seen or caught.
Really, I think anything where the scouts are not allowed to rely on home comforts makes for a good learning experience, and encouraging teamwork and competition in building challenges will make things more interesting for the scouts.
[Experience, Beavers -> Venture scouts (UK) with being an assistant leader on several cub/scout camps]