Id personally go for the biggest you can . We have a 12 ltr for four of us but it does every thing from a fried breakfast . bread , pies , a roast too a huge stew for 20 plus when needed , every time i see a smaller dutch oven i do wonder how much you can do in them . We have the Dutch oven and a selection of stainless pans. A 4 ltr with loop handle by Tatonka and an Alpine nesting set 2 ltr and 1.5 ltr by MSR . they all nest inside each other . which if you have a pan set could be a good guide to the size of dutch oven just on a space saving aspect
Try Here for all your Bushcraft cooking equipment. I (and most others on here) have bought from Ronnies and can't fault the goods and service.
I'd suggest that you get a couple of Dutch ovens so you have a choice (you never said how many you cook for) you will also have the option of a double cook (stacking) if you need to.
The RS tripods are great, but they are not very tall so you will struggle if you use a firepit on legs. As Rob says, you can make a tripod yourself. - I'll leave it to him to enlighten you on how ;)
------------- In every walk with nature one receives far more than he seeks. ~ John Muir
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets