I've been up to Planpraz / Brevent 20+ times, and it never gets old. I'd highly recommend hiking around up there if you are able and then lunch afterwards either up at Brevent or Planpraz with a nice view.
You should definitely check the weather...更多
Upon reaching the Brevent peak, you will be greeted with amazing views of Mont Blanc across the way. There are hiking trails aplenty. We hiked down to Brevent Lake and back, which was amazing. At the Planpraz station, paragliding is a must-do!
If you ever dream to make this paragliding experience, this is the place! The local instructors will take you to "once in a life time" ride paragliding ride above Chamonix valley. The price is reasonable, 100 Euros. Enjoy!!!