Freezing veggie enchiladas- need help

SareBear30

I was thinking that I would make KA chicken tacos tmr and double the recipe so we would have extra. I wanted to use some chicken to make enchiladas and freeze for later.  Here is where I'm stuck:

What sauce should I use? Basic red enchilada sauce? Or would sour cream sauce freeze well?

 I like to make a few with veg, but last time I did some with spinach and froze them, they weren't fit to eat. What about squash and/or bell pepper? Think that would freeze ok?

Thanks!