We will be in Paris for 2 days, May 30 - June 1. We have a rail pass, and plan to catch the train from Gare de Lyon to Aix en Provence. I have heard that it's cheaper to book your reservation in Europe, but just wondering if it will be booked up by the time we get there. Does anyone know how hard it is to get a reservation on the "high speed" train, mid week, if you are a rail ticket holder? We have B&B and car reservations in Salerne for June 1-3, so we do need to get to our destination that day. We will be in London May 28, is it possible to do the reservations from London? Thanks all!