As far as what to wear under your scentlok I would suggest something that won't make you sweat alot after you combine that with your scentlok. I usually wear a pair of sweats over top my clothes I plan on wearing in the field so they don't stank up for the ride over.
I usually get suited up after I get out of the truck as long as it is not a real long walk.
I don't think you need a special bag, just a heavy duty trash bag should do fine. Just make sure you start airing it out about a week before. Those trash bags stink.
I personally have been very satisfied with my scentlok. Just remember anything that goes in the woods has to be totally scent free. (bow, grunt call, boots, etc.) If EVERYTHING is not scentfree no amount of scentlok matters.
