Blow drying V.S. Air drying

I don't know anything about those lotions, but the blow drying is really up to you.  If its cold and they're going to be outside, better to blow dry than let them go out wet, if not, then it doesn't really matter.  If you use the blow dryer on the hot setting, it can be damaging, but if you use it on the cool setting it is not damaging, so there's no harm in using it if you wish to.