OOPS! After further reading, I realize my response wasn't so different from some other posters... at least not 2a.
I have a kind of different take on this than most ladies.
1. I agree with most that he needs to let you do your passion. This is something you love and he needs to be more accomodating for you.
2a. When he told you that getting the kids ready for bed was too much to do my inner wifey jumped up and said "well, I do it every night! Why is it not too much for me, but it's too much for you?" But that's me - and an issue my husband and I have been working through....
However - this is where I differ...
2b. When he told you that it was too much for him to do, you unilaterally decided to "fix it." You never asked him "if I take care of getting the kids ready for bed, is this something you can do for me?" (At least, you didn't say you did.) Instead, you blindsided him as you were ready to leave. He didn't have any prior knowledge that he might need to adjust his plans for the yard to allow you do something you love.
3. You said "he thinks he did nothing in his actions that caused disappointment." Because he didn't. He did something. You felt a certain way. He nor his actions caused your feelings. Another person might not have thought twice of it. You cannot blame your husband for how you feel. There's nothing wrong with how you feel, but it's only under your control - not his.
Now, with that said, I agree with other posters that you need to have a sit-down conversation about why he has such an issue with you pursuing your passion.
My husband sounds a lot like yours - he made excuses for everything he didn't want to do. Yours is making excuses to prevent you from doing something you want to do.
You need to get to the bottom of his issue with your theater stuff. Heck - maybe he's insecure that you have this passion with your best friend and he and the family will be left behind. From your post, it sounds like you really have no idea why he doesn't want you doing this type of thing - he gives a different excuse each time.
My guess is that if this type of scene replayed 10 times, and you found a way around his excuse each time, he would have 10 more excuses as to why you couldn't go.
Talk to him when you're not trying to go do something like this - make it a completely neutral time (it works best for me and my husband when we're out on a date - easier to talk). Get to the bottom of his issues with this and then deal with those.
It almost sounds like he wants to be "enough" for you - that you shouldn't need to seek fulfillment or enjoyment outside of him. He "busts his hump" to do things (he sees as doing it for you) and then you want to go off and indulge in this passion he doesn't understand or appreciate.