The thing about athletic recruiting (and especially GK recruiting) is that you just don’t know. I know of a rather short female GK that was recruited to a fine academic D3 school. As I am sure you know, pretty much only the no. 1 goalkeeper plays – until she doesn’t. So this creates a fluid situation. Most recruits don’t want to sit on the bench for four years, so there is attrition. For any given year, there may be more need for a team than goalkeepers (particularly backups). In this respect, some degree of flexibility would be an asset (i.e., committing to a college that you did not anticipate committing to or that may not have every single quality that you are looking for).
The difficulty in recruiting is for the athlete to make an emotional commitment to the process, and still not be disappointed if it doesn’t work out. Starting early could help. I would recommend getting tapes made to send to coaches now. Remember, filming just one game is not going to be enough for a keeper. Who knows how many SOG are going to happen for a single game, and there are many skills you are going to want to showcase (saves, coming off line, punts, 6 kicks, other distribution). With size being an issue, you also are going to want to show the ability to save high shots. If you send tapes to the coaches now, and make a few college visits to meet with coaches (perhaps over the summer), you can see if the process is gaining any traction.