I don't think he planned to unbarry her (at the time of the original crime).
I don't think he thought he would ever be charged, ever need an attorney.
He thought his alibi was satisfactory and his interviews, proof of his innocence because a guilty person wouldn't agree to them, says him.
Fast forward. He needed money. Not just every day money, he wanted that 15 million. So what did he do? Looks like he used Suzanne. Again. His (il)logic seems to flow something like this: if Suzanne's remains are found, consistent with the bike ride abduction which no one believes, everyone will believe it.
But...
He didn't expect BAM to linger in bone marrow. Nor for it to metabolize. Upending any claims it was planted at autopsy.
Didn't expect experts who could testify that the clothing (which wasn't even consistent with Suzanne's matchy matchy bike wear) would have no scent of decomp and the soil in which he remains were found, same. Indicating that her body did not decompose at that location, further highlighted by missing bones.
So this mystery abductor, why in heaven's name, why would he move her remains? He had remained a mystery.... all eyes were on the husband. Yeah, no one does that. Moves a concealed body at a time when LE hasn't even sniffed in his direction, to a location where she is more likely to be found.
Only Barry would have reason to move her, dumb as his reasons are. So where was she in the interim? Just how many times did he move her? From PP to the beach site? Interrupted at the beach site, moved to another location? Ever notice how some people never have the time to do a job right, but they have time to do it over? (Hello, Wall.) Maybe the fact that her remains were relocated (as evidenced by the missing decomp/bug activity) is actually consistent with Barry, having moved her plenty. Paranoid. Second guessing. Doing it over.
I still think she must have been in water and not just water, but flowing water. Not sure if water alone could have a bleaching effect on bones, maybe something unique in the ice-melt of the Rockies? Or did he "treat" her body with concentrated bleach?... I'm envisioning a unique burial... bottom of a mine, for instance, with some water (it was May, the beginning of the melting season), maybe he poured in some bleaching chemicals to erase his own DNA, and after a few freeze cycles, and plenty of run off, he was only able to recover what he could.
Wondering now about the Crested Butte ensemble. We have come to learn that was Suzanne's comfy clothes. Really the perfect thing to throw on after a chilly sunbathing session. Perhaps those were the clothes she was actually wearing at the time of her murder, quickly separated from her and disposed of in a separate grave, unearthed to be re-graved at Moffat.
Not even someone trying to frame Barry, could frame him as well as he framed himself.
Never mind that the sheath was in the laundry with his own shorts.
JMO