Pour all the fruit in a colander over the sink and allow the juices to drain. Press gently with a clean kitchen down so to help remove the moisture through the colander and help dry the fruit. If you would like, you can put a bowl or towel under the colander and place it in the fridge for an hour or two. Set aside.
In a large mixing bowl, combine the sour cream and package of orange jello powder. Stir until completely combined.
Add the drained fruit and marshmallows to the bowl. Stir to coat.
Chill in the refrigerator for at least one hour, four hours is better.
Stir right before serving; serve chilled!
Notes
To dry the fruit fast you can put it in a salad spinner or use a clean lint-free kitchen towel to dry the fruit by hand. The dryer you can get the fruit, the less "soupy" the finished salad will be.