Travelling to Marciac is easy, their are regular flights on Ryanair to Pau and Biarritz.  Pau is approximately one hours drive from the Chateau and Biarritz is about 2hrs+.  British Airways and Easyjet fly to Toulouse from Gatwick.  Air France fly's to Pau, Biarritz and Toulouse from Paris. For other low cost carriers see the  Air Ninja website.

You can also catch the train from Paris to Pau or Toulouse and then hire a car.

A good website to use for planning rail and ferry journeys around Europe is Seat 61 and a useful site for finding out which airlines fly to which airports is Dohop flight planner

Guide Books of the area that we have used can be purchased here

Maps of the local area are published by Institut Geographique National (IGN) and these maps show the area.  The access the IGN site click on the map. :