I agree with what John says. These events are much more enjoyable if they are run separately. I recall several years ago, our Area D qualifier was run in conjunction with the Outback Cup and it was a bit of a decision regarding what fleet to run in and honestly the racing wasn't that good because of all the separate starts and such. When you have one fleet one start (even though it is Portsmouth) it's much easier to know what to expect on the water. Everyone is a competitor and there for the same reason. I do enjoy our individual qualifier and our attendance is on the rise ever since we began making it it's own event.
As long as it's one start with overall handicap scoring, there's no reason you can't break out fleets and give fleet awards as well.