actually they are technically supposed to be entered into HRMS but most places are not doing it. Even if you go on TD for one night it should be in there. From HRMS Coach:
Reference: CFAO 20-50
A member that is assigned through Temporary Duty (TD), Attached Posting, Class C or other procedure normally accumulates Time Away days for each day the member is away from home. This includes the travel time between their home and the location of the tasking. To accurately track the number of days a member is away from their home, you must record the member's Home Departure Date, Assignment Arrival Date, Assignment Depart Date and Home Arrival Date for the period that the member is away from home.
All members on TD, Attached Posting, Class C and MITE training taskings, where the Away from Home field has been set to Yes or Unknown, display in the Travel and Waiver panel.
Training taskings, where the method of assignment is Attached Posting, may display in this panel twice: one is the Training record in the MITE module (the Data Source is MITE); and the other is the Attached Posting record in Track Global Assignments (the Data Source is Assignment). Where a Data Source of Assignment and MITE exist for the same training tasking, record travel and waiver information against the MITE record and reset the Away from Home value on the Assignment record to No.
This procedure is completed to record a Temporary Duty (TD) assignment or a Task. Tasks are assignments or duties that do not involve time away from home, but form part of a member’s career history. In the past, these assignments or duties have been typically recorded on the Member’s Unit Employment Record (UER).
Where a member has been scheduled to attend a training session administered through the Military Individual Training and Education (MITE) module, the training tasking displays on the MITE Data panel automatically. There is no requirement to record the training tasking in the Task panel when the method of assignment is Temporary Duty.