Using google earth more than the cheapest spot my be of help. However the best thing you can do if your still home is as follows.
Pick up some cheap things from goodwill, chairs, garbage cans, even homer buckets from HD. Most you can take back or even better re-donate.
Find a big parking lot. Churches on weekdays, schools on weekends, sports facilities on non game days. Get some friends have a BBQ, set the obstacles up and practice! You won't hurt anything and you will learn a lot about yourself and your rig. Pace a fuel island and take that to your tryout. This way you can find out what you can and cannot do.
Years ago we made this an event with friends and family to help the war dept. learn how to back up the 5th wheel. It was a no stress good time for all.
Keep it light and fun!
JMHO