The easiest way to keep them is to go to your local pet shop, and buy one of those plastic "Kritter Keepers" with the neon colored lids that have holes in it. A medium sized one is plenty big enough to accommodate about 100-200 worms at a time.
Of course, if you buy them online, and get 1,000 at one time, you're going to need a bigger container than that! LOL
The best bedding to use for them is dried Quaker Oatmeal (but I would buy the store brand, as its much cheaper). If you get the largest size, in the round cardboard container, the Kritter Keeper will be about half full when you put it all in there. Add the Superworms, and put in 4 or 5 slices of raw apple, laying them on top of the oatmeal bedding. That's really all you need.....other than that, Superworms pretty much take care of themselves, and are very easy to keep, with very few die-offs.
The most important thing to remember, when keeping Supers, is to change the slices of raw apples at least every other day. Leaving them in there longer than that will result in your having moldy bedding, and since the worms gutload themselves on the apples and the bedding, and your beardie eats the worms, moldy bedding can make your beardie very sick, so be sure to change them out at least every other day.