Doable but you need to make important connections within ortho. Those can be made through rotations and research. If you like your home program take call with them when you aren't busy on another rotation. It is a great way to get to know the residents. They think you are awesome that you are taking call with them even when your not expected too. And it is a great way to get ready for aways.
Agree with above about step 2, take early and do well (very well if you can). 3rd year grades mean more to certain programs. Resident performance studies actually point to 3rd year grades as the best predictor of good residents, not board scores (who would have thought?). However, due to the large number af applicants to each program they are using board scores to wittle down how many applicatnts programs actually look at. Programs are not going to read through 300-600+ applications. And there are many who get great board scores and do very well during 3rd year.
Other than step 2 and finding good connections you got to work your butt off on your aways. Do at least 2 aways. Work hard and get to know everyone you can (residents and attendings). Show you are a team player, a hard worker, and easy to get along with.
Do all these things everything else people are suggesting, apply, have a back-up plan of some sort, pray, and wait. Welcome to the club!