I agree with Charles completely on this matter....
I've found it much easier to "get permission" from the MRS since my now 10 year old son Cooper got old enough to travel with me to steam ups and machining events.....I fondly refer to him as "my ticket". I still monitor him closely when we run our engines, but he is gaining confidence and independence with loco operation and control with each passing event.
Of course now I have created a monster as he won't let me go anywhere train related without him at my side!....but it is great fun sharing the hobby with one's kids, and I figure keeping "him in steam" will help us all survive the teenage years!
Looking forward to seeing all our live steam friends in a couple of weeks at Cabin Fever....
Regards,
Cliff