Last January The 15s were in Toy Story and Love Bug,but really they can be anywhere .
But,January/February does not see the numbers of 15s that July does!
In "15s intensity" think of January/February as Big Thunder Mountain Railroad and July as Rock n' Roller Coaster meets Expedition EVEREST!lol
I would just ask at Check-in if The 15s are in a particular section or sections and express that you don't want to be near them!(Don't worry-you won't be the first to make such a request!lol)
And if you get COLD weather like we did last January,The 15s will be much more "subdued"-the COLD temps really affected their "energy level"!lol