Your refrig. will probably be far less able to handle the temp. Keep your drinks in an ice chest so you don't have to open the refrig. If temp. can't be kept low enough in refrig. transfer perishables to ice chest.
Fans help to make you feel cooler while a/c is running. A/c can only do so much for an oven on wheels. The hotter it gets outside, the less it will cool the inside.
Shade for refrig. side of trailer and a/c if possible.
We live and camp in 100*+ temps. It's not like being in the mountains or on the coast. Prepare to be a little warmer than you probably would prefer.