I find keeping the boat going dead downwind in the gybe is more important than where the traveler is, but I do let it out quite a bit. I always try to S turn in the gybe, so as the boom comes over, I'm actually steering down more, not up, so when the boom does go -Bam- after crossing over, both bows are squre downwind to absorb the push down, in heavy wind of course.

Then I trim in the spinnaker, head up to course, then bring up the traveler last. This would be when singlehanded obviously.