If the SC tag is still on it, you definitely have a right to know where the car is and retrieve at least that. Any small stuff, like speaker covers, that can be removed without much effort, could be salvaged by you during that visit. And my recommendation is if you don't have the means (storage location, time, and wherewithall) to remove parts, don't mess with a "buy pack" for salvage. I know folks on this forum would like to have the stuff from the front end because it's intact, based on your posted pic of damage. They aren't the ones typically that would be removing the parts. Nothing against them, that's just the way it is. In the past, I've done some junk yard trips for Merkur parts when I found one locally. I could always sell them on eBay to fellow Merkur owners for a sizable profit.

And the salvage yard, assuming they've already paid your insurance carrier for the wreck, knows this fact too and won't part with the car without some profitability in the "buy back". The motor alone is worth some real coin! The salvage yard may even closely scrutinize your visit because they want to sell any & all parts off the vehicle. It could be worth 20-30x in parts what they paid the insurance carrier for it.

I've never yet met a salvage yard man that was poor! Their "Field of Wrecks" are typically worth a bunch!