Hi Owairoa,
You mentioned the following surnames GRIMASON / GRIMISON, PRESTON, SPRINT and WOODHOUSE.
I would like to point out connections to the GRIMASON surname that you may not be aware of.
The SPRINT and WOODHOUSE connections are in County Armagh, Ireland.
William GRIMASON married an Ann WOODHOUSE on the 13 January 1847 at Drumcree, Armagh, Ireland.
William GRIMASON /GRIMISON married Isabella SPRINT on the 17 October 1856 at Kilmore, Armagh, Ireland.
Mary GRIMASON married Andrew PRESTON on 2 November 1910 at Belfast, Antrim, Ireland.
So as you can see there is now more than one connection between the surnames you mentioned.
You also now have some locations to work with as well.
The GRIMASON surname is a registered Guild Of One Names Study which I registered.