My golf cart goes 12 mph. It would take ~1 hour to go from the start line on the long course, recover a vehicle at the five, and tow back to impound.
If you think you'll be setting a record on the long course, you need a tow faster than 10mph get to impound in legal time (60 minutes).
Even on the short course, we have come close to 1 hour using a motorhome as a recovery vehicle, since we drive it slow on the return road.
Personally, I'd use an ATV instead due to the their faster speed. Even though the golf cart is much safer (ours has full lights, horn, seatbelts, CB Radio, tow hitch, fire ext, first aid kit, etc), it's just too slow with the governor in place. The ATV is FAR less safe, but the better choice.