Unpredictable hair for formal events

I have two Sunday weddings this month....which OF COURSE is greatly affected by MY HAIR!!! I know my hair is not running anything....but it is !! I have been running to check the weather forecast for humidity & rain 2-3 times a day.  If you know anything about the Chi, you know July & August is hot as hell with temps ranging in the upper 90s not at all usual.  And on top of the norm, this year in addition to the 90s, we have been blessed with FREQUENT RAIN!!! Great for my garden, not so great for straightened hairstyling LOL!
The first wedding was 8/8 & DH, not so kindly requested " Can we not do the big fro?" Me trying to be accommodating, said OK & planned to straighten my hair for an updo with a really cute hair flower.....WHY DID IT RAIN SAT EVENING? :(  Needless to say with the humidity at 95%, NO WAY was my hair any wear near not reverting with just the thought of stepping outside.  I had started straightening when I realized it was fruitless & would not last 24 hours.
Instead I just decided I would wear a 4a curly half-cap and blend my front in, after a rodset.  This worked out beautifully....I got mucho hair complements.
For the second wedding this coming Sunday, I pretty much plan on a half cap also, since the weather has been unusually humid in addition to the heat...and as much as I love my natural hair, I want a more predictable look for these weddings.
I also want to say Sunday evening weddings are detrimental to my hair styling options for the upcoming work week :(
If I take any half cap pics I will post them.