I was just there the other night. And, I have been there quite often during the construction process. If you are going during the day, you will be able to park in the parking garage or in the back. I HIGHLY recommend parking in the back. You just go down to the stoplight for Typhoon Lagoon and turn towards DTD. We parked there Friday night, and it was MUCH easier than the parking garage. You can take a boat to the Marketplace or walk to Pleasure Island. The entrance from the back goes towards DQ and Cirque.
However, if we hadn't gotten there early like we did, it could have be a nightmare. It was a nightmare a few weeks ago when we parked in the garage and had to walk everywhere through the crowds. And, it was a Thursday night. The boats are not travelling to Pleasure Island which makes the walk a lot longer.