PA,
Don't get too discouraged until you talk to the adjuster. Every insurance company is different so it's difficult to forecast what the outcome will be based on our past experience. Remember that an insurance adjuster's findings are his OPINION ... professional opinion yes, but an opinion nonetheless. You may ask for a second opinion if you don't agree.
I have the personal opinion that mine would've been totaled after I parked it on the side of a van on I-95 if I hadn't worked closely with both the repair shop and the insurance company. I helped source some of the parts & even did the leg work on getting the half shafts rebuilt.
Now is when your membership to this site is gonna pay off. Keep us posted on the progress and we'll help do whatever it takes to get your beast back on the road.
As for finding the dipstick that hit your VX. Don't lose any sleep on it. Unfortunately since there appears to be no witnesses, they'll never be held liable even if caught. My daughter was in an accident - exchanged info - other driver left before police arrived - police contacted other driver who denied being involved in accident - case dropped.
My condolences on your woes!!!
t4b