Output Pin Driving Another Output Pin

The schematic wdshen posted is corrrect. This is what I meant.

MOSFET or BJT doesn't make a great difference nowadays in this configuration, provided you select them correctly, in particular the specification on maximum current.

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I assume I should connect the other end of the harness directly?

EDIT: Also, I assume that this MOSFET should be located near the receiving end?

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No! The buffer must be placed at the transmitting end, just outside fpga; unless it wouldn't make sense, since you'll have the fpga pin still driving the long wire.

I'd neither connect the receiving side directly to fpga, for similar reasons; I'd place a buffer here, too.

Using buffered lines allows you to use a higher voltage for testing the harness, thus improving emi immunity.