mehitabel's experience is that the furled bundle behaves well in the lifts in any wind, and there's never a need to use extra ties to tame loose fabric. 'No deck work' philosophy.
But I often tie the bundles near the mast and at ~3/4 chord, for two reasons:
1) The reefed sails shape better, with less twist and a tighter leach (matters most if sailing to windward - into shelter, say.)
2) If I'm thinking about gybing and the wind is very strong, and the bundles are already bundled, it's safe to do (however dramatic.)
So I have beckets pre-fed through eyelets just above whichever batten, and I catch the becket each side of the sail and tie under with a slip reef knot. Easy to undo when I round up to raise sail. Easy enough to move the beckets according to optimism, or precaution.
(If I had batten pockets, I'd have punched holes through for the purpose by now.)
In the Trades, I'll go around for days with unnecessary reefs tied in unnecessarily. The little sails work really well, and I can't always be bothered to haul up the whole lot and take longer getting off anchor, just to take longer dropping it all to get anchored again several hours later. 'No extra work' philosophy.
Cheers, Kurt