No worries .
This wouldn't impact your current guest connection :
First: Create an ACL for your DropCam
ip access-list session DropCam-ACL
(Ports needed or allowall)
Second: Create user-role DropCam-Role
user-role DropCam-Role
access-list session DropCam-ACL
Third:Create UDR with either OUI or Mac address of your Cameras
aaa derivation-rules user DropCams
set role condition macaddr equals "11:22:33:44:55:66" set-value Dropcam-Role description "DropCams"
Forth: Assign UDR to AAA Gues Profile
aaa profile guest-profile
user-derivation-rules DropCams