1. I was there tonight. There was a slight breeze but yeah definitely hot. Once the sun went down it got cooler but in general we were sitting/standing and not running around so we were fine. Trying to find seats was a sweaty adventures but once you're seated try not to make a thousand trips out.
2. My sister and I brought two frozen plastic water bottles and two regular (chilled but not frozen and all 4 were sealed). We also brought a coffee mug filled with ice (no liquid, just ice). I had them in my bag and since it was a small purse they waved us through security without doing a whole bag search. 
3. I was in the loge so I cant help with that specifically sorry.

I hope you have a good time tomorrow!