We use easywdw. But, no matter what you do, it's important not to get hung up in the 'rating'. Sometime a '6' can really feel like an '8'. But, most of us have little data to support what a '6' is even supposed to feel like. Follow the park recommendations. That's what really matters. If every park is busy, it only makes sense to go to the one that's least busy (within your overall plan, of course)