led, feed, feed, feed until the foundation is drawn, don't depend on any nectar flow. if you need to supplement a pollen substitute, you may consider this as well if you experience a pollen dearth, for texas and shb problem, dry form of some type rather than a patty.
mites, depends on how many mites they come with, sometimes it may not be necessary to treat until the following season, but if you do mite counts, by all means treat them if need be in the fall.
queens, the queen that comes with the package may get superseded, so look for this, seems to be the most reported problem, and have experienced this myself. as far as adding eggs from a feral trap out, i have never done this so will let others who have chime in on this.
good luck with those packages!