Holy moly. Hardcore! Hope the weather holds and you have a fantastic time xxCamping. We also have Mr W's bike packed the same way, a smallish rucksack (me) and a post bag/courier bag (him) with a 3-man tent in it. This is the luxury version of doing this for us (we have a much smaller lightweight tiny tent for wild camping which would just go in one of the bike bags) because it's the first time we've tried camping since he got ill and a bit of extra space/privacy for changing etc seems wise. And we're using an actual campsite with toilet/shower facilities.
Why this kind of bags? Because you can't fit normal pannier racks to these bikes (no frame eyelets/the geometry doesn't work - especially on my tiny bike).
Edit, no kids this time, they're at their dad's.