Thanks ever so much for everyone that kindly replied with tips and advice - much appreciated.
So whilst I agree the logic of the bigger boat on the inside bankside the most sensible I'm going to go small boat inside - both lined up Sterns together both will have independent ropes to bank attached to scaffold poles driven 5ft into the ground with hat tops so ropes can't slip off - I will do the same Bow end and have tyres as fenders - I will attach both boats together too - is that sensible?
Current water level to bank is 4ft and there will be small 6ft wide pontoon both ends of the smaller boat - these are floating option if level as leveles rise.
I like the sound of the stout reflector board but have no idea what it is?