Welcome to Pond Boss.
What you are suggesting certainly will work. How long they will survive into the summer really depends on what part of the state you are in. I'm about 20 miles west of Winchester. My trout survive through May, but I've seen a few that last through June. We had a member here a few years ago, near Harrisonburg, who keeps them year around.
They will need to be fed, but feeding is easy.
Good luck,
Ken
