concerning your plan to activate the Zugspitze, the available space might be a real problem, especially on weekends or public holidays (i.e. also Wednesday 15. August). Via this panorama you can get an impression how crowded the summit and the platform might be:
Two snapshots from today:
I made an activation of the Zugspitze a couple of years ago not from the platform but directly a couple of meters below the summit, because I was not sure whether the platform is still within the activation area. You first have to climb down from the platform by the help of a ladder a couple of meters before you climb up again to the summit. But the activation from below the summit isn’t recommended though.
Concerning your planned activation of the Alpspitze, the summit can only by reached by climbing of Via ferrata’s. They are not very difficult, but you should be prepared that they aren’t simple hiking paths. Here is a youtube link to get some impression about the way up and down the summit of Alpspitze:
The Alpspitze is also frequently visited. An impression of the activation area of this summit can be gathered from the following panorama on google maps:
Have a nice holiday and enjoy your activation!
73 Stephan, DM1LE