We spoke to Roche (Accu-chek)on the phone today at length and got ridiculous remarks from the customer service rep including "if you can afford an RV you can afford to buy new strips". He was adamant had nothing constructive to offer. He said no to the fridge and no to an insulated bag with an ice block. He claims that condensation on the strips will ruin them more than the heat will. All he would say is in summer heat over the temp range on the bottle leave the A/C running. Of course, we cannot do that if we are out of the campground and parked somewhere for the day. We pushed to the point of asking what do people without air conditioners in their homes do who have diabetes and live in hot climates - he could not conceive of anyone not owning an air conditioner until he conceded that maybe poor people don't have air conditioners. he said that in 9 years of doing this job he has never had this question asked. We ended the conversation with his saying don't travel and if you do test the strips with control solution and if the bottle is then out of range, throw it away!
We will look at all of the suggestions here and see what we will do. Thanks for the responses!