Lodge is a great brand and a lot of people like the Camp Chef ones too. The oven with out the feet and the domed lid like in the photo is a Dutch Oven and that style is normally used in the house as it can be set on a burner or put in the oven and even hung over a fire. The ones with legs also have a flat lid with a rim/lip on them and are used over charcoal hence why they have the feet and the lid with rim is flat so it holds the charcoal. Some people with the regular style make stands or use lid holders under their ovens and that lets them put them over charcoal. The lids are usually interchangeable between the regular and camp also so you could just purchase an extra lid.
For recipes just do a search for dutch ovens, dutch oven recipes, or dutch oven societies. There are thousands of recipes out there. There may be a dutch oven group or society in your area too. The Boy Scouts have recipes on their sites along with many other sites and forums too. Lodge sells cookbooks and Amazon or other places have a bunch of books. Some of the best cookbooks are the small ones made for fund raising such as from churches, Scout Troops, clubs etc.
Here's a good forum. www.camp-cook.com :: Index
They have info on how to season your cast iron and keep it in good shape. Information on refurbishing old cast iron, even rusty, to be reused. Tips and tricks. Recipes. They also run the tiny teardrops and travel trailers site with info on cargo trailer to camper conversions, homemade trailers, etc. The link is at the top of the page.
Using the ovens over coals on tables or on the ground works good. Another way to use them that works nice too is with a Volcano stove. I have used them on my older non-collapsible charcoal versions, both the large and small, and they work great. I have the new collapsible one with the propane setup, but haven't used it yet. I mostly used them for beans where I just sat them in the Volcano and let them cook, but you could do them with coals on the lids for other stuff like cobblers and breads or whatever you needed to have top heat to brown things. Volcano grills
I have some recipes and cookbooks saved on my computer, but some are PDF files that I don't know how to post and some are word files that somehow converted to PDF files and on my computer I have to open wordpad or something like that to see them now and the Adobe reader won't open them so I'm not sure how to post those either. If someone knows how to do this, I'd be glad to try and post them. I could also look up certain recipes for you and copy them possibly.
I grew up around cast iron skillets and grills but didn't see a dutch oven until later on. I used to help my Nephews' Scout Leader with their cookouts. He had been doing Dutch Oven cookouts with them for around 35 years at the time. Man that guy could cook. Not much different than cooking in an oven at home, except for learning how to regulate the temperature and times with charcoal.
Some other little things that are nice are either lining the ovens with foil, parchment, or the store bought liners when cooking some things especially if they are sticky as this makes clean up a whole lot easier.