If you really want to be able to get the feel of a tailwheel and go someway toward mastering the art, then try and get a hold of a Cessna 180/185, with an Instructor who knows how to fly the thing. This of course should be after your conversion, say on a PA 18, or similar. If you can master that machine in a good gusty xwind, then it will be good grounding for most other tailwheel machines
Be a rare flying instructor that could catch a Skywagon when its starts to head for hedge! I could have done with him last year when I bought one
Good luck with the tailwheel flying - my advice is just buy one!
Irish