autodiscovery mikrotik devices auto fill password for device

I am redoing my dude from scratch aahhhh
If I have multiple type of mikrotik devices can I detect them seperate and auto fill a password in?
can I auto discover a devices system identity and device type without snmp?
What about snmp on the AP and pulling the device name from the ap by the ip of the cpe?
Or using routeros and adding a default password so routeros connects?
If I have to have snmp on for every cpe is there a eash way to push it all teh devices?
Will this create a lot more traffic on my network if I isolate teh snmp to just my network?
Thank you for the help,
Aaron