The best thing I can suggest is to find a REALY REALY big parking lot with no bump-stops and few light poles where you feel comfortable playing around.
I used to live in Columbus Oh, and about two minutes from my house was this exact scenario. About two acres of pavement, set back from the road, very few light poles, very few people who parked in there past 6:00pm. I've seen it dry plenty of times and know it is perfectly flat and smooth, the kind of dark black pavement that is perfect for doing donuts in the rain(even with my stock setup). Plus it's far enough from the street that there is very little chance that people not in the lot will see you...
Last winter I went here to play at night. I learned a lot in a very short period of time. Felt safe doing it too. spinning in circles, straight line for 60 yards where ahead is over the passenger side mirror out the side window, drift into drift, drift into 360 into 180 in other direction into straight line... Very much fun.
I also learned that you don't try this on any public street. Well maybe a little over power through a turn when there's nobody around and no parked cars, but basicaly never when you around other people. It'd be great to drive like Burns or McRae on the streets, problem is, when it's you behind the wheel, most of the time you have absolutely no control of what the car is doing and 9:10 if it does what you wanted it to do it is just pure chance and not skill.
AWD doesn't create miracles, and it doesn't create skill.