You can use the following Python Code to disable editor tracking when applying an asset package and the Editor Tracking fields will be maintained when it appends the data.
You need to Stage the Utility Network, Apply Asset Package schema only ( This is important in order for it to work ), run the following Python Script, then Apply Asset Package with load data box checked.
enterpriseGdb = r"C:\Projects\ENTERPRISE DATABASE PATH"
tables = [
"{}\\{}\\ElectricDistributionAssembly".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricDistributionDevice".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricDistributionJunction".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricDistributionLine".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricDistributionSubnetLine".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricTransmissionAssembly".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricTransmissionDevice".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricTransmissionJunction".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricTransmissionLine".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ElectricTransmissionSubnetLine".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\ServiceTerritory".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\StructureBoundary".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\StructureJunction".format(enterpriseGdb, "UtilityNetwork"),
"{}\\{}\\StructureLine".format(enterpriseGdb, "UtilityNetwork"),
"{}\\JointUse".format(enterpriseGdb),
]
for table in tables:
arcpy.management.DisableEditorTracking(table)
After you load the data then run the same script again but change the last line of the code to:
arcpy.management.EnableEditorTracking(table)
I don't think there is a way to export an asset package and maintain the editor tracking fields yet.
Hope this helps!
6.2.6