I'm not too worried about the popping yet, enjoy your new trailer.
As for the heat, in my opinion....make sure you order in the extra fans. I ordered my RL with 3 fans and they are great. If we aren't going to be in the trailer for a few days, I push a button and they come on automatically if the temperature gets above 78 inside the unit. It's been in the high 90's around here for the last couple of weeks
SOB "The RV Wiseguy"