I am running out of space on my 16GB wifi iPad2. A lot of it is music (7GB). I am thinking about subscribing to iCloud but I have the following reservations. Am I correct about these things: 1) My music will be physically removed from my iPad, except for those items that Apple cannot identify. 2) Since I have wifi only, if I am at a place where I cannot access my wifi network (like in a car), I will not have access to most of my music. Any corrections or confirmations would be appreciated.