buy in bulk from any of the online cricket/feeder supply stores available. store crickets in a large rubbermaid container, as already suggested. put in alot of egg cartons, torn up into two or four egg sections each. you can get big egg flats from most cafeterias, just find one close to you, such as one at work or school, and ask if they can keep the cartons or flats they get their eggs in for you. once you have about twenty, you are pretty good for awhile.
feed crickets either commercial gut load, or the same mix of greens, vegetables and fruit you would feed your bearded dragons. for moisture, a slice of orange, potato, squash or carrots work. change food for crickets daily. fish flakes or crushed dry dog or cat food works as well.
you can also set up a second rubbermaid bin for your crickets, and dump what you have left into it, then wash the first one and rotate this way between them, this way you don' thave to find someplace to put what crickets are left. or, every time you order a 1000 crickets or so, you can put the new order into the clean empty rubbermaid container, and when the last batch of crickets is all used up, you can clean up the bin and have it ready for your next order of crickets. t his makes cleaning them easier and less chance of escaped crickets in the house.
to catch crickets, what i always did, was use a sandwich sized ziplock bag, hold it open in the cricket bin and take a section of egg carton, and empty any crickets in the carton into the ziplock bag. also, before adding crickets, if this is the feeding that will be dusted with calcium and multivitamin powders, i would put a bit into the bag first, then add the crickets. this makes it easier to dust the crickets.
to feed the dragon i would dump the crickets either one by one into the cage for the dragon to catch and eat, or dump into a cermamic flat bottomed bowl for my dragon to eat.
another little tip, when ordering in bulk, order a size smaller than the maximum size your dragon can eat [ie the space between the dragon's eyes]. if a 1000 crickets is too much, order just in groups of 500, depending on how much your dragon eats and his age. as adult dragons don't need to eat insects as much as young dragons, buying a 100 crickets locally every couple of weeks may work better than buying 500, as once the crickets are adults, they do not live very long.
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PHLdyPayne