One/two of our team members will not be able to meet up with us until later. Can we go ahead and start hunting without them?

There is nothing wrong with this as long as that team member is not hunting someplace else. This should not be used to get around the splitting up rule. It should also not be used to get around the “No One Man Teams” rule. No single team member should be hunting alone unless they are pre-approved by judges to do so.