-Dry hop before the fermentation is totally complete. I realize its difficult to get a gravity sample from a carboy so visually may be your best bed. This will be around the time the kraussen starts to fall but you still see floaters bubbling around.
-If you're racking at FG then definitely add the priming sugar and wait until fermentation restarts (probably an hour or less). Then rack under CO2 pressure into the purged keg. Try to just barely lift the bung, inject the solution, then cap it back up.
-Get it out of the ferm as quickly as possible. Keep your dry hop to a day or two if you can.
Yeah I did both DH additions during active fermentation.
I will add the priming sugar and give that a try. How much priming solution do you typically use for a 5 gallon batch?
One more thing I'm trying to figure out. I use a blow off tube (1in tube on top of airlock in bung and swivel barb on the other end into pitcher of sanitizer) and when I took a sample last night it obviously sucked up some sanitizer into the tubing (only about a foot or so...nowhere near getting into the carboy).
I'm trying to figure how to get the liquid out of the tubing and get a gas disconnect on without introducing O2.
I was thinking about taking the tubing out of the sanitizer and slightly squeezing the PET carboy while simultaneously screwing on the gas disconnect. Would that work? Anybody have any other ideas?