Accepting/Declining Intents to Enroll for CSU/UC/CA private U's

For transfer students,
CSU Intent to Enroll Deadline - May 1
UC Deadline - June 1 (?)
Private U’s - varies, most likely much later than June 1

My problem is that I have only heard back from CSU’s and one private (Mills), nothing from UCs or other private U’s (SCU, USC, Scripps, CMC).
I’m getting a little nervous because my decision to attend a CSU really depends on my admission to UCs and PrivateU’s AND financial aid offers.
I would feel more comfortable knowing if I can accept a CSU offer and withdraw if I were to get admission to a private school I hear from much later on.
I have done some research online about this, but it’s all about first-year student applications. No info on transfer apps.
What have you guys done in this case? Let me know if you need extra information from me.