If all the prices are the same, I'd go either WL or BC. You mentioned WL didn't seem very Disney, in my opinion and it's mine only, WL seems a tad more Disney than CR. CR always reminds me of a convention center and doesn't really seem that kid friendly to me. As far as the heat and walking, you are going to take a boat from WL to MK or over to CR to catch the monorail to Epcot and you are going to bus everywhere else. You can either monorail or walk to MK from CR (frankly the walk if much faster for me) and the monorail to Epcot, you are still going to bus to AK and HS and if the monorail goes down (which it often does) you are going to bus to Epcot as well. At BC you can either walk or boat to both Epcot and HS, the boats have AC but we always walk it, even when my son was little. You are either going to bus to MK or walk through Epcot and catch the monorail and bus to AK. It just depends on where you think you are going to be spending the most time.