For gutload, you can either buy the gutload from the petstore, or make it yourself. I found the following recipe on the Borderview dragons webpage (sorry can't recall the addy right now):
4 cups rolled oats
2 cups skim milk powder
2 cups crushed low protien catfood
2 tsp calcium with D3 powder
Mix it all together and store it in an airtight container.
I added a cup of cornmeal as I had noticed the store bought gutload had some (also, thought it was part of the recipie LOL).
In addition to the dry stuff I put in the same mixed greens I feed my dragons and either carrots or slices of oranges for moisture.
When I dust my crickets, I put in a pinch each of a mulivitamine and Calcuim with D3 powder into a sandwich bag (just the cheap kind, without the fancy tuck in flap or ziplock top). Shake it to mix it. To catch the crickets, I just shake the pieces of egg carton I have in the cricket's container into the bag till I have enough crickets in the bag. Shake again to coat them then I pour the crickets into the Dragon's cage, a little at a time to ensure he can eat all of them. I also keep track of how many manage to go hide or get overlooked, so I can help the dragon to find them afterwards.
I am not sure how you are keeping your crickets but what I do is keep them in a 2'x1'x1' clear rubbermaid type container (may be bigger than this, can't recall the exact dimensions). I used a rotery tool to drill a bunch of small holes into the lid (any drill that can hold a 1/16th of an inch drill bit will do, or just a nail can be poked through instead). Basically drilled holes all around the edge of the lid to ensure good ventilation. I have two shadow lids in the container for cricket food, one for dry gutload the other for fresh greens with carrots (or orange slices or potatoes). In the rest of the container I put pieces of egg cartons (about two 'pits' per piece). The crickets hide in the egg cartons and the cartons make it easier to dump crickets into a bag.
When I buy new patches of crickets, I try to time it so I will use up all the crickets I have in the late afternoon feeding of my lizard so I can clean the cricket cage before putting in the new batch (since they come in a bag from the petstore, I just leave them in that for awhile longer). I throw out all the old egg cartons, wash the container with an antibiotic dishsoap or similiar cleaner, rinse well and dry. I wash the feed dishes as well and put in new dry food and fresh food, finally new egg carton. Then I toss in the crickets...discarding any egg carton that may have come with them. They are smelly enough as it is from the petstore so I want to ensure they can get clean in a clean environment.
I also advise buying them in lots of 100 or more, depending on how much your bearded dragon eats per day. It will save going to the store to pick up more every day and tends to be cheaper. The cheapest thing to do is find a local mail order breeder of crickets and order then in lots of 500 or 1000 (course you will need to set up a larger container than the one I use above, that one is good for up to 100 crickets. The larger rubbermaid containers (120l or more) are better for larger amounts of crickets)