It's probably a $6 cab ride, and with a bunch of luggage I'd make sure to tip a dollar a bag on top of the regular tip.
Why is it about $6 for such a short trip? Well, as soon as the car starts there's a initial fare of about $2.50. Then it clicks by the time and distance. now the distance would only add a dollar or so, but by the time you go through the gate and the three traffic lights (if you take the short route) or all the way around and under Crescent Lake on the longer route, and actually get in to the drop off area, it's going to be another $3~ in time/travel.
Anne