If you are playing in Pinburgh, I highly recommend sticking around for Saturday and Sunday. Assuming that you make finals on Saturday(that's 160 players), Saturday night and Sunday are your best times to enjoy the rest of the show. There are just a crazy amount of games there and you need the better part of a day just to see/play half of them!
As for hotels, since the Westin block has no Wednesday available, I decided to bite the big one and get that single night at the Courtyard across the street and the remainder of the nights at the Westin. The regular rate at the Courtyard is $259/night, but at least you can cancel. The freakin Westin you can get a room for the same price($259) but it is non-refundable. If you want a refundable night at Westin they want $311/night plus taxes.