You certainly could leave the bag for another 5 days. I do think the fruit would get a little messy by then, though.
On second though, if you're looking for more flavor why not add more fruit at the beginning.
@MiBor, you are correct that ascorbic acid reacts with chlorine and will neutralize each other. I have used it to remove the taste of chlorine in water for my wife. It took 0.5mg of the vitamin c per gallon of water. It would be too risky to try this with wine. The safest way is to follow...
Refractometer Brix scale vs wine concentrate. Here's my tale: My refractometer scale goes to 32°. I have bought concentrated juices with a listed Brix of 65°. Do you see my dilemma?
@jgmann67 I use mine pretty much as you do. FoodSaver does sell adapters for large and small mouth canning jars which come in handy for liquid storage. I also own a freeze dryer and some foods I put in canning jars and vacuum seal with canning lids. Some of my wine making supplies I do seal...
@artooks, my technique to solve this is to push the lever down to seat the cork and hold it there for a few seconds. This seems to allow any compressed air to escape through the side.
My wine making got started in 1968/1969 when I was stationed at Lowry AFB, CO. Came to work one day and my supervisor asked me "Airman Watkins, you ever make wine? I have this here recipe...." It was the same recipe as @rustbucket's.