My . 02 since I have an 04 DRW 4x4 with a flatbed. Call it a synopsis
First I was glad to see flatbeds were not on the "bodybuilder" pdf.
I would ditto the comments the comments about the difference between "not recommended" versus "prohibited". Also, 03 and 04 DRW did not have snow plow package option so a snow plow package and camper was not a possibilty. Snow plows were not recommended for CTD DRWs.
If you are going to mount an afterbody or camper mounts, etc. follow the TSB on welding or bolting and no problemo.
I have never seen a thread documenting a fame problem. Appears to definately be a case of CYA and liability. If it was a problem, I'm confident you would see it on TDR.
No difference between a SRW and DRW frame.
Lastly, a frame busting is a life threatening situation. If there was a serious problem, and not a CYA-liability, e. g. this coffee is hot!, I would think DC would be proactive in letting folks know before they lose the farm with law suits. Case in point, ball-joints on the Durangos and Dakotas create a life threatening situation, and thus, a recall.
In summary, I will be happy and drive it like I stole it and if something breaks my widow can sue DC :-laf