Obviously booking kind of late since it's only a month away but I think I found a good solution, I've got the Ibis budget Lille Englos (ex ETAP HOTEL) Autoroute Lille-Dunkerque HAUBOURDIN on reserve for $86, it appears that we can take the metro into Lille from St. Philibert which looks to be a short drive (or bus if such thing exists) and has parking. My other options were the Mercure in Roubaix which was $170US or the Ibis in Tourcoing for $130, both of which are very close to metro stations. Does this sound like a good plan? We are driving in from Bruges sometime on Saturday and intend on visiting on Sunday morning.
I'm familiar with the Ibis Budget and Ibis hotels, the recent reviews of it are fine.
Also, if I'm reading the Grand Braderie site correctly, the market does not close overnight? Do people really stay out at it during the later hours of the evening? Are they still selling things or does the nature of it change after dark? We have been before but only during the earlier part of the day.