I agree with skipping bagging them. Like also mentioned, it varies when they are going to drop out. Could be a few days or could be a couple weeks. Instead of waiting around for them to drop out, I zip tie a knee high stocking to the end of my siphon hose and just filter them out that way.
Are you bottling or kegging? If your kegging, skip the secondary and just dry hop in the keg. If you do dry hop in the keg, use a muslin bag. Actually, I use the knee highs for this too.