That's probably about right. You can even taper the edges a bit to 'blend' the openings with the thicker cover (ie. clear some of the heavier vegetation, but leave a little so that it's not completely open at the edges of your opening). Remember that deer, especially bigger bucks, prefer to be in cover whenever possible so they'll avoid large openings. I made the mistake of opening up one of my lanes too much and the larger deer simply stopped using that area and began to favor one of my smaller openings instead.

Scrape areas are often perennial, so I'd avoid changing them too much so you don't change whatever it is about that area that makes it attractive to the bucks for scrapes. I try to think in terms of small 'lanes' from my stands, and not open 'areas'. Doing that maintains the sense of cover for the deer, but still provides you with shot opportunities.

I'd also echo ISnipe's comment re: setting up multiple stands if possible, and to stay out of the bedding areas (if you can find them). Just catch the deer coming and going from those areas if you can.