During deployment the logs are saved different locations depending on the process that creates the log files.
Take a look at the list below and hopefully it can spare you a couple of minutes.
|WinPE before formatting HDD||X:WindowsTempSMSTSLog|
|WinPE after HDD is formatted||X:SMSTSLog C:_SMSTaskSequencelogssmstslog|
|Windows OS during Task Sequence execution||C:_SMSTaskSequenceLogsSMSTSLog|
|Windows OS after ConfigMgr Agent is installed and initialized||%WINDIR%system32CCMLogsSMSTSLog|
|After Task Sequence Execution is completed||%WINDIR%CCMLogs|
|Workgroup and Domain join log||%WINDIR%debugNetSetup.LOG|
Remember that MDT is always you friend.
By using the SLShare variable in CustomSettings.ini you can get MDT to collect some common log files and copy them to a fileshare.
Folders will be created under the Logs directory for each machine you deploy.