Your mare, being bay, is E_ A_ and no cream. The "_" mean we don't know if it's E or e and A or a.
The stallion is a double dilute, so CrCr. I know you said cremello, but without testing, really the double dilutes are technically impossible to tell WHAT they truely are. You can guess, and very often be correct, but there is a chance you're incorrect. So, stallion could be bay, black, or chestnut under the two doses of cream. But, that doesn't really matter since even if he IS a true cremello (ee CrCr with a's totally unknown), your mare has the E.
So, that said, your foal could be buckskin (Got E and A), Smokey black (Got E but aa), or palomino (got ee).
Appy patterns are trickier... getting Lp will give characteristics and roaning. So if the foal gets Lp from mom, yes, you likely will get roaning (but they can roan out at different rates). And if either sire or dam have sabino, and the foal gets that, too, that can boost the Lp and give false blankets.