Workflow for importing scanned images and changing capture date ?

I've created several EXIFTOOL Batch command files to apply metadata prior to import. My filenaming convention is set in the Export control of the scanning software.

REM Apply Basic Metadata for Slides and Negatives

REM ---------------- Change the Following for each run --------------------

REM Use 'description' for a general compent on the group being processed and 'title' when it is common across all.

REM fname is the name to save the metadata to for future use. Use first part of prefix
set fname="C:\Users\paul\Documents\ExifTool_BAT\_temp.BAT"


set title="Some Cottage 1982"
set description="Some Cottage 1982, Gull River"

REM Original mediaInfo FILM:Kodacolor II (5075),ISO:??,SIZE:?? [either negative or print],COLOR/B&W, Confidence in original date.
REM Need place to record develop date
set "m1=FILM:Kodacolor II (5075),ISO:?,SIZE:35mm,Colour,Date:1982"
set mediaInfo="%m1%,Scan(Epson,2400dpi,Auto Exp,Color Restore,ICE=Quality)"

REM Keyword SLIDE,NEGATIVE,PRINT. 
REM Add LOW RES to 'T' Thumbnail pictrues. HIGH RES for HI 'F' 
set keywords="HI RES,FILM,NEGATIVE"

REM This will replace the Make and Model of the scanner used
set make="Pentax"
set model="??"

REM Location should be within the city if possible
set location="Street Name"
set country="Canada"
set prov="Ontario"
set city="Smith Falls"

REM Date/Time format YYYY:MM:DD HH:MM:SS
REM Date of scan
set createDate="2021:03:22 11:30:00"

REM DateTimeOriginal is many times a guess reflected in mediaInfo/UserComment
REM For unknown dates, set to '1977:07:07 07:07:07' or year and 7's

set DateTimeOriginal="1982:07:07 07:07:07"

REM Special handling for FileSource https://exiftool.org/forum/index.php?topic=1939.0
REM 1 = Film Scanner; 2 = Reflection Print Scanner

set FileSource=1 


REM -------------------------------------------------------------------------

REM Add Basic tags for a set of images

set creator="Paul Lastname"
set copyright="(C) Copyright 2021 by Paul Lastname"
set email="paul@email.net"
set terms="All rights reserved. Any use of the original and derivative works of this image must be licensed."

echo exiftool -overwrite_original ^
-mwg:Creator=%creator% ^
-ImageCreatorName=%creator% ^
-Contact=%creator% ^
-OwnerName=%creator% ^
 ^
-CreatorWorkEmail=%email% ^
 ^
-mwg:Copyright=%copyright% ^
-xmp:usageterms=%terms% ^
-n -xmp:copyrightstatus='CS-PRO' -xmp-xmprights:marked=true ^
 ^
-mwg:Location=%location% ^
-event=%location% ^
 ^
-mwg:Country=%country% ^
-mwg:City=%city% ^
-mwg:State=%prov% ^
 ^
-title=%title% ^
-mwg:Description=%description% ^
-ObjectName=%description% ^
 ^
-DateTimeOriginal=%DateTimeOriginal% ^
-createdate=%createDate% ^
-DateTimeDigitized=%createDate% ^
 ^
-Make=%make% ^
-Model=%model% ^
-UserComment=%mediaInfo% ^
 ^
-sep "," -keywords=%keywords% ^
-XPkeywords=%keywords% ^
-n -xmp:filesource=%FileSource% ^
  . > %fname%
 
 call %fname%

Thanks. I really would like to preserve my folder / naming scheme.

Currently I use YYYY/MM/YYYY-MM-DD_sequence as the locating/naming scheme.

I believe everything would be fine if LRC applied the Metadata preset before renaming.

If there was "Reimport" function, I could run my files through it again to have them renamed/relocated. But that option doesn't seem to exist in Lightroom.

I guess using Exiftool prior to import is the only way to do go without going crazy with the workflow. Wish LRc itself could do this instead.

I think your options are:

- Use an external tool to set the date before importing.

- Use a different foldering scheme. 

For my tens of thousands of scans, I put them in folders named with the number of the slide trays in which they resided or with the codes on the negative sleeve.  That way, I can easily get from the scan in LR to the film original.  At the time of import, I often don't know the capture dates.  Much later after import I set the capture date within LR using a plugin similar to the Capture Time To Exif plugin that lets me set a batch of photos to have the same date with times sequentially increasing by 1 second.  

I handle that issue by creating a folder with the date and event name of the scanned set of images i.e.:  1985-04-04-boyssoccergame. Then I name all of the file the very same name plus a sequence number. That way the folders automatically sort in date order in Lightroom Classic and the images sort in date order when the contents of a folder are viewed in the library module.  When viewing the folders outside of LrC in the OS file management, the same applies when sorting the folders by name.