Yes, some females will attempt to make a redd (bed) (with trout the female makes the redd), while others will reabsorb their eggs. Your males make be fighting too, which could stir up the bottom. It's stressful on them so do don't be surprised if you see some mortalities.

I have all males so I don't have too many problems. But even my males will become harder to catch around spawning time (my rainbows are fall spawners). I've see brown trout and steelhead in the wild that are as difficult to get to bite as salmon during spawning time.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.