Welcome! I have to admit, your post made me laugh - because I have had so many similar moments - and recently, too. My baby sister calls it the 'Bridget Jones Syndrome' - where all you want is inner poise and to be pulled together, but your granny pants get in the way. And it's like every little silly thing, like your tripod (I had my own tripod drama this week, too), seems determined to thwart your best intentions.
I had the most perfect outfit on last week, only to find that Weather Channel's guesstimate of the local temperature was off by about ten degrees (it was colder, of course), so my rain trench turned out to be not nearly warm enough. Then about midway to my car, a mischievous wind was absolutely determined to render my umbrella useless - and it succeeded, by collapsing it twice before pulling it inside out. Oh yeah. That four-block walk to my car was not at all as I imagined when I got dressed an hour earlier. And the super-cute fabric Tod's bag my sister sent me, was absolutely not waterproof.
So by the time I got to my rehearsal, I was a soggy shivering Bridget Jones-mess. And then my friend, who is my Sharon/Una rolled into one, made me coffee, and everything was better. Lots of laughs. And when I got home, I took a hot hot bath and put on seven layers of warm stuff.
I guess my point is, you are going to have lots of days where your best laid plans just get up and make a run for it, and if you can laugh, then you're already making progess