7rider did an end-to-end ride of the Parkway within the last year if I recall. You might use the search function to find he posts/threads about it. I've had several friends ride all or part of it. All have said it was pretty challenging. You're a relatively new rider, right? If so, I tend to think a Sept/Oct timeframe for 2012 would be somewhat more realistic. Unless you can ride hills all winter, doing it in the spring--regardless of how experienced you otherwise are--would be tough. Plus, you'd encounter a lot more wet weather.