It is possible to camp along most of the Augustine Camino except at Faversham and Aylesford Priory (where the cost of B&B is relatively modest). Some of the campsites have restrictions at busy times so it is worth booking ahead.
You can always combine camping with baggage transfer to keep the weight down.
Day Two – www.coldblowfarm.co.uk/camping,
Day Three – www.palacefarm.com/campsite-kent-downs
Day Four – % Painters Farm Campsite Faversham
Day Five – www.campingandcaravanningclub.co.uk/campsites/uk/kent/canterbury/canterbury (Alternatively there is a Youth Hostel (www.yha.org.uk/hostel/canterbury)
Day Seven – www.nethercourt.com