Safbrew is a pretty hardy yeast, you should be fine. When in doubt, you can always throw another 11g packet in there if you don't want to rehydrate. Since I have gone dry, yeast that is, I haven't gone back.
Brewing a Saison today or tomorrow. Bit out of season, but ready for a taste of spring. Anyone going to the conference in Philly? I got lucky enough to grab a room, sold out in hours.