My opinion is, it depends on the complexity of your configuration.
If you have lets say10k APs in one AP group then you will really only have one AP actually VAP to manage. This is no problem.
If you have only 50 APs but you have 25 remote offices with 2 APs each and each has its own controller and configuration need the you will have 25 AP groups to manage, 25 public IPs to keep up, 25 controllers to manage. That is a bear to me. Sure this is a little over the top and probably doesnt exits.I would definatly want some help for this
I guess its up to you and how confident you are in your abilities.