Hi Friend,
Solution is as follows,
1. Bring up Master-Local setup
2. Disable ADP on both the controllers
3. Configure two AP-Groups.
4. AP-Group1 : LMS IP= Master Controller IP, AP-Group2: LMS IP=Local Controller IP
5. Provision APs with Master IP (Master controller IP ) through DHCP or DNS
6. Once all APs terminate on Master, Provision 16 APs with AP-Group1 and remaining 16 APs with AP-Group2
This is the ideal solution for you requirement. Please feel free for any further help on this.