I don't have any websites to offer, but I wanted to reply to this post as I love DO cooking. My experience is almost entirely with the oven sitting in a shallow hole dug in the desert. So some of the things may not apply if you are cooking on a concrete pad or maybe in a steel fire pit in a campground.
First of all without seeing it I'm going to guess it's a 10" model as they seem to be the most common in the stores. I also have a 10 inch with the stubby legs and it can be a bit of a challenge. The short legs cause the pot to sit on and crush the coals. So I always have to find three similar sized rocks to put under the legs as spacers. This works okay, except when it comes time to rotate the oven you have to be careful to put the legs back on the rocks.
I personally do not subscribe to the no soap crowd when washing the oven. I've had enough friends try that and there is always a slight taste of rancid oil to everything they cook. So I use soap and either a wet paper towel of a sponge. Just wash it quickly and don't leave the soap water in for very long.
Many people are now using dutch oven liners when they cook. With the liners you will not get the seasoning from the cast iron. But you will get a much easier to clean up oven. You can buy liner everywhere, but they are incredibly easy to make out of parchment paper.
Link to making a linerUse decent charcoal like Kingsford. I've tried the cheaper store brand charcoals and they always seem to go out rather than cook you food.
Get a charcoal chimney, it's just easier for lighting the coals.
ChimneyIf it's cold and windy when you are cooking then find something to keep the wind off the oven. If you don't, the wind will cool the oven and it will take forever for things to cook. Also if it's windy it's a good idea to start another batch of coals about 10 minutes after the oven goes on the first batch of coals. The first coals will burn out in about 20 -25 minutes and you will want to have more to replace them.
A lid lifter is nice to have, but a pair of large channel lock pliers does the job too.
Link
Here's a challenge for you, try to make a successful peach cobbler in it. I do this for fun almost every time I'm in the desert. My main meal is usually something else, the cobbler is just for fun so no big deal if i wreck it. I've tried varying the size of the cans of peaches, the amount of the peach juice, the amount of coals top and bottom etc. I've had decent success, but nothing that i would be proud to show off. BUT, on the positive side it always tastes good, no matter how bad it looks.
.
2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup