Hi Andy
My opinion FWIW:
These are a great start, but it doesn't take into account gates, ground condition, terrain, steepness, etc etc.
How many sites are 5's, just out of interest? Which are they ? I think it would be interesting to see these listed here. The 2-4's would maybe need more detail.
As someone already said, it depends on the individual and the more detail the better!

And how many are rated 0?

;-)

.o0O0o.