At the starting co-ordinates, you will find one of the 13 display panels of the Clyde Sea Lochs Trail. The three paragraphs on this panel tell you about some local history, aviation pioneering and a local novelist.
To find the cache, you need to gather information from this panel as well as from the two stages.
Panel:
First paragraph: A nearby hamlet is mentioned. Number of letters = A
Second paragraph: Where was this pioneer born? Number of letters = B
Third paragraph: Which century is mentioned? Second digit = C
Stage 2 - War Memorial
43 brave men from Cardross have lost their lives in the wars.
How many were called James? = D
How many were called William and Malcolm? = E
Stage 3 - The Cardross Trust
The land you're standing on and the adjacent recreation facilities were gifted to the people of Cardross.
In what year was that? 3rd digit = F
Final
N 55° 57.ABC W 004° 39.DEF