Yeah, PtGui works, no problem there but the result is a TIFF, not a DNG.
Autopano from Kolor allows you to work in full HDR, and create .hdr or .exr files - in theory at least you should get as much information as in a .dng - and even above that if you shoot bracketed.
I shoot 360s, and where HDR needed my workflow today is:
1/ Shoot NEF bracketed appropriately to cover the dynamic range
2/ Export JPGs from LR, where I choose the appropriate color balance and correct distorsion / vignetting
3/ Batch-Merge JPGs to .EXR HDR in Photomatix (that step is basically "fully automatic" - there is NO ADJUSTMENTS to make at this point)
4/ Create .EXR 360 panorama in Autopano (from Kolor)
5/ Tonemap in Photomatix to 16 bits TIFF
6/ Adjust locally in Lightroom to taste (doging and burning, adding contrast / clarity...)
If time is a constraint, I somehow simplify the workflow by tonemapping to TIFF in Photomatix at step 3/ above - the remaining steps are then much faster - and of course step /5 goes away.
I use Photomatix for HDR rather than LR or PS because it gives me much more control as well as a great batch mode. I can do much more, more precisely, in much less time.
I HAVE to use Autopano for panoramas, as it does build full 360*180 panos (full spheres) something that LR and PS don't (yet?) do.
You can see a recent example of the full workflow at :
https://www.360cities.net/image/modest-but-cosy-interior-in-versailles