Good to hear other perspectives. Seems I have the right considerations in place, primarily the effect responding to unforeseen emergency situations.
I've got to say that 30mph is already quite a bit higher max han I was thinking. I am in the 20-22mph 'comfort' zone, both from a safety and physical perspective.
As I am new to this I will be taking it easy until I get more miles of trailering experience.
I've got to say it is very fun and my son so far loves it!