As long as you went over the car well and are sure that there are no major problems with the car, go for it. I drove mine back home bout 6 hours in February. It was 45 egress at the start of the drive and 34 degrees with some high winds by the time that I got home. The smile was frozen to my face and I would do it again!
How long of a test drive did you take and how comfortable of a car was it? If you do decide to drive it home, figure on 10 miles per gallon for gas and budget/plan accordingly. I would bring a couple extra quarts of
oil just in case, as you will not knowhow much the car might leak/burn
oil. Sunscreen, lots of it! Depending on where you are driving and cell phone service, you should have a couple cans of fix a flat, tire plugs and glue and if you have an accessory outlet get a small 12 volt air compressor. Even if you have AAA, if you get a flat in a remote area you may not have cell phone service. Remember, cobras do not have spares. I always carried around materials for taking care of a flat tire just in case.
Have fun, let us know what you decided to do and post pictures!