Mary Beth -- It depends on the age of the children. Bob is correct when he says that there are only beds for 6. However, if one is a toddler, you may be able to have them sleep on the floor in a sleeping bag.
The Ocean front units (Check-in Fri or Sun) are the largest. However, they only have one shower. Check the reviews in the review section.
There is a Publix supermarket (small but complete) about 2-3 miles south of the resort. Also there is a Cumberland Farms minimart less than 1/2 mile south.
This is a smaller resort with less amenities than you are used to at Vistana/Orlando, however, the activities director is great with the kids.
Let us know how it goes since it has been a year since I was there are we had another hurricane last fall.