It is suggested that you book your home resort at 11 month window to be sure to have something and then switch up at 7 month window. And I agree with the others that lake view at BLT for mid-May shouldn't be too hard to get at 7 month window. Good luck!!! And WELCOME HOME!!
Mid-May is a moderate DVC demand time when near park resorts are readily avaialable at 7 months out. Close to certain to getting BLT lake view for mid-May and good chance for theme park view if considering that. However, very low chance for standard view which is usually gone at 7 months out much of the year. Note, if your home resort is SSR, no need to reserve there at 11 months out becuase it will be open at 7 months out in May absent some disaster like SSR burning down. As a new member you may be wondering about 7 month availability year round and thus may want to read my rather lengthy recent post here: http://www.disboards.com/showthread.php?t=3281173