College Advisor turn outs

[Guyute]

I've been on a college run robotics team for the past 3 years. While growing with this team I have notice one big problem which seems to be the lack of turn out from college students as advisors. I've talked to some advisors to see as to why they aren't commig back, and its not that they hate the team (THEY LOVE US) but its the fact the FIRST takes up soo much time during the year and on top of that they usually have a bunch of homework. The team I'm from get a lot of veterans who were on teams in high school and understand that FIRST takes a lot of time and deadication. I guess my main point of this thread is are other college runned team having the same problems and what are those other teams doing to work it out?