personal opinion
Hyrule: poor stage for her. she can't catch a lot of the faster characters and she doesn't have extreme knockback moves, so fsmash, bair and charge shot will kill at dumb high percents, and only from certain areas of the stage. she dies quickly from tornadoes (especially the platform one, don't be surprised if you lose a stock at 60ish percent), she lacks sufficient, easy to land, non-situational tent combos, and her gimp power is greatly reduced. BANNED STAGE
Congo: bad. bombs mean you can survive a bit longer and try to catch the barrel, but the situation has to be right because of her **** airspeed and vertical height on upb. it's slightly more difficult to land hits because of where she has to space, as the platforms are too high for adequate tech chasing. the only plus side is the shorter horizontal killzones, meaning fsmash and bair will kill characters sooner. the lack of ledge di hurts her a bit, but it hurts everyone; she does gain the ability to upb through the stage, though, and disrupt the opponent that way.
Peach's: bad again. while you can do some nifty things on this stage like drop cancels and upb'ing directly onto the top platform from the moving one, her recovery is awful because of no ledge and because those wedges get in the way, and her kill moves are disrupted wayyy too often by the side wedges and the bumper. however, if you think you can outperform your opponent on this stage, it's not a bad counterpick.
Dreamland: good for Samus. everyone knows the platform tech chases are her deadliest option, her recovery isn't awful and she can ride up dL's wall, and it is an overall good map on which to estalish superior stage position. it's easier for her to gimp characters here and harder to be gimped herself. you should take a gander at mixa's posts detailing where hi-fsmash will kill as opposed to bair.