Is some planer snipe to be expected?

Yes, even if in-feed and out-feed tables are aligned. The entry and exit rollers will force the beginning of the wood down, thus lifting the rear so snipe happens on the front - then as the wood exits, that entry roller will release the end of the piece causing the rear to rise up to the blades.

That's why you cut the wood long, mill to thickness and then trim the ends to length.

OP has a DeWalt 735.

Thickness is one of the first operations on any board. You don't do a finish length cut first or finished width cut mainly because you want the wood to be FLAT with both faces parallel on the saw bed (or the jointer) when you make those critical cuts.

Nearly all planers will create some snipe unless you master the tricks some have described in detail (lift, push, sacrificial feed push, extended tables, etc.) If there is any pressure on the board that is not exactly the same in front of and behind the cutter, such as when the end of the board runs past the roller, there will be some snipe.

I'd prefer cutting off the snipe than relying on using a technique (trick) to try and prevent snipe. Else, I could lose the use of the wood if I mess up the technique.

Perhaps I've been confused for a long time.