I'm planning a vacation in May and would like to know the best way to book my on-site room before trying to switch to the entertainment rate. I have both Loews and Entertainment cards. Should I initially book through Loews, a travel agency, hotelkingdom or US website? I will eventually switch to the Entertainment card rate (hopefully), but I'm not sure what is the best way to book it first. Does every place that I mentioned allow you to switch over the reservation once the entertainment rates come out or only certain agencies? Has anyone ever had problems switching once the rates were out? Thanks