Kelly50,
We are also from KC, and had the same problem last summer. Was at Branson the end of July, heat index was around 110+, and ours was giving us big problems. We had to do the same you are doing with the freezer packs. We didn't think we'd have a problem & didn't have enough to keep them in the fridge all the time, just did it during the day, and got by. We had problems with the fridge before this, and it was replaced. When we got back from Branson I took it to 2 different dealers, and they both told me the same thing, it was working as it is supposed to. At the 2nd dealer I had them install the fan in the back of the fridge. So far we haven't had a problem, but this summer we are work camping in Colorado, and don't have the high temps like at home. In case you aren't aware of it, the fridge in your camper has a different system than the one in your sticks & bricks home, so it won't stay as cold in the hot temps. Also I learned at the national rally you can't pack food in it like you would do at home, the cold (semi cool) air needs to circulate in there. Putting the fan in the back will help some, also one of those battery operated fans that you stick in the fridge will also help. They are cheaper at Wally World. From what I understand to install the fan in the back, you have to pull the fridge out into the kitchen. I didn't want to mess with that at the time & had them install it, I think it cost around $200.00.
Where in KC do you live? We are North of the river.