respectfully snipped by me for relevance
I agree that BSL did not put an extraordinary amount of effort and creativity into disposing of Mickey's body. He seems to have a propensity for hiding bodies/items under something, i.e. LP's body under boards, and Mickey's bicycle under water (until it receded, of course) and for setting fires. IMHO, he either put Mickey in water, i.e. with her bicycle at/near WB or under brush/foliage; or burned her remains. I don't believe he removed her body far from the original crime scene (30 miles in any direction max) and definitely, imho, did not take Mickey to Texas.
However, having said that I just thought of something...it's a little far fetched sounding, maybe, but that's my vivid imagination for you...

what if he dismembered her body and put it into a weighted container and disposed of it at sea when he went out to his off-shore job. Maybe
too vividly imaginative for the likes of BSL, though.
As sad as it is, IMO, I don't think Mickey's remains will be found anytime soon, if ever.