I am considering this trip via a partial southern route I 20.. Jackson Mississippi, possibly a stop in Terrell Texas, on to Odessa Texas to Route 10 up into New Mexico and Arizona.. What kind of weather can I realistically expect? Thought about I40 but after some research it seems that the higher altitudes in that route could be icy or a lot of snow at that time of year...I will be towing a 31 foot travel trailer... Any advice would be greatly appreciated.....