I think if you use all the knowledge and experience you have about Daily 5 in your Elementary School experience, you'll find that it will work well with the students you have now :). Of course, time limits may change your overall set up. Although the Sisters suggest that older students need to do Read to Self and Writing daily, your students may still need Word Work and the good modeling of Listening to Reading (maybe you could bring in reading from content areas). Perhaps you could alternate two choices each day.
I really think Daily 5 is a great plus for kids with ADHD, as they know the jobs will change, and you can help them develop a personal agenda or schedule--you also might want to read on the website about "Barometer Children", and think about how you could adapt the ideas there for your older students.
It sounds very exciting, and I hope you will share back here with your learnings and "Aha's!!