Here are a few options for you:
Option 1
To organise your airport pick up by comparing the cheapest cab, please click here. You will be taken to a website that compares the price of taxis and will give you the cheapest quote. You can only do this for trips within 3 months. So if you want a quote but your are coming later in the year, just put in some pretend dates.
The address of your log cabin is
24 The Grove
Harleyford Estate
Henley Road, Marlow, Buckinghamshire
SL7 2SN
Option 2
You could try Uber which is now operating in the UK, they offer a £15 discount if you type in this code signup15 Please click here if this interests you.