I see that the British Grand Prix is the week after Le Mans 2013 according the the latest provisional calender.
And the New Jersey one the week before. I'm already planning June right now :
8-9 : Le Mans testweekend
10th : finish pictures for CA Guide
11th : fly to NYC
15-17 : F1
18 : fly back to Brussels
19 : arrive at Brussels, switch suitcases, pick up motorhome and head on to Le Mans
19-24 : Le Mans
It could have been worse
.
Looks like it's not such a rush for you now :-(
http://uk.eurosport.yahoo.com/news/formula-1-ecclestone-new-jersey-gp-073956810.html