I'll be taking the Eurostar from St. Pancras to Gare du Nord and my first museum visit is the Orsay. From GDN I'll walk to my hotel then take the metro from Pigalle station to Solferino station and from there walk to the Orsay.
I initially planned on buying one carnet and the Pass at arrival on GDN but I've heard terrible stories about long lines there for tickets. I don't know if you buy tickets AND the Pass at the same kiosk/window/line. I know I can buy tickets at St. Pancras or the Eurostar paying a little extra, but AFAIK they don't sell the Museum Pass, so if I have to get in the same big line at GDN for the Pass this doesn't really help me.
Maybe I could buy tickets at Pigalle station, but I don't suppose they sell the Pass as well? Getting the Pass at the Orsay is out of the question, right?
Thanks