The more I think about what must have happened that night with Mickey, I think that everything went wrong for BL as soon as Mickey was in the truck...and he that he was probably frenzied and panicked by the time he dumped the bike and got rid of Mickey, due to his injuries, if indeed they came from a struggle with her. If so, I am thinking he probably did not go to any great lengths in concealing her but did whatever was easiest for him, yet still relatively "secure."
I still think it is possible she was put in water at or near the site of the bike. I can't help listening to Tim Miller, as he has said this twice, that she could have been put there and they would never know. So in his mind, that location is not "cleared." I just can't imagine he would want to stop numerous times-he must have been sweating adrenaline by this time, probably desperate to get home, clean up enough to go to the hospital and maybe get some sleep.
Anyway...even if he just left her in a weed-covered ditch or gully, it doesn't make it any easier to find her, unless they look in the right ditch or gully...I remember Michele Le's body was not well-hidden and was near an area that had been generally searched, yet she was not found for a few months and only by a dog- walker by chance.
I hope she did not end up in the Bay, as I doubt she will be found, if so. If she is on land, there is a chance.