Watch out for what the classical makers do. Their instruments have far lower string tension, so they often get away with a "rubbed" joint, even skipping the usual clamping. For maximum holding power, you want as little glue left in the joint as possible, so clamping right after applying is most likely the best procedure.
I heat bridges in the microwave to about 105F to allow enough time, but I still move right quick to get the glue on there and clamped up.
Don't forget that liquid hide glue is a perfectly good alternative in many situations - just be sure to get it before its expiration date. All the instruments I built from 1966-1974 were done exclusively with liquid hide, and as far as I know, there have been no glue failures.
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Cheers,
Frank Ford
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