Maybe the GM guys aren't posting on here in the same volume as the more popular overlanding rides do. Pop over to CK5.com and check out a few of the multipurpose builds (K5's. Subs of many generations and SAS'd GMT400's and GMT800's). I haven't put together a build thread here, but I'm big on going against the grain. So I'm running a 91 V1500 Blazer (aka K5), mild lift, Bilstiens, 3/4 ton axles and a modern 5.3 LS small block. Most recent add for camping comfort (key word being camping) is the vintage FWC Blazer camper I found. Modern power/fuel economy in a sweet bodystyle with a very stout drivetrain.
I'm in the middle of refurbishing the camper to make it useable for a run to Mojave Road/death valley in a few months.