I always put my fruit in mesh bags, but some still escapes. You can try a couple of things.
One is to get a very large mesh bag from the homebrew store, and then line an ale pail with it. Pour the must into that, and then take the bag and tie it. That will contain most of the big chunks, but still ferment on the fruit (sanitize first, of course!).
Siphoning is going to be a huge PITA, but if you move to secondary before 7 days, you should be ok to pour/strain if you want to go that route.