Try this solution:
FYI the Work field is a total equal to the sum of regular work and OT work.
If you see 8 hours work and 2 hours OT in the usage view, that means 8 hours
total *including* the 2 hours of OT, ie, *6* hours Standard Work and 2 hours
OT.
1. Task X, 5days, Starts Monday
2. Travel, 1day, Task Calendar 24 hours, "Task Calendar overrides Resource
Calendar" set on
3. Task Y, 5 days
Link all tasks FS. Assign Fred to all. Split screen and re-format bottom
window to Resource Work. Shows 8 hours total work on Travel task. Enter 8
hours in the OT column (task turns into a milestone with zero duration -
that's because OT doesn't count for duration so 8 hours work with all of
them in OT means the duration is zero). Total Work remains at 8 hours.
Remove Split. Switch to Resource Usage View. Be sure to get both! OT Work
is "planned OT." "Actual OT Work" is just that. Right click the right hand
side and add the rows for Overtime Work and Actual Overtime Work to the
view. Travel will show scheduled for 8 hours Work, 8 hours OT Work on
Friday night. For actuals, enter 8 hours in the Actual Overtime Work row
for the day travel actually occured. You'll see 8 hours in all 4 fields -
Work, Actual Work, OT Work, Actual OT Work. Task will revert from a
milestone diamond back to a normal task bar on the date(s) travel took place
after entering the actuals.