I hope that they are not teaching hypogastric artery ligations anymore, especially since most in the community are now against it.
At our institution, we have a busy Gyn Onc service, and generally the OR dynamic is as above. The resident and the fellow perform the TAH/BSO, Cone, TVH, etc while the attending stands back and looks over the shoulders or retracts, and then positions are swapped and the attending/Fellow complete the staging, debulking, etc. There are some of us that are going for Gyn-Onc and in those circumstances (and depending on how motivated you are) you do more including inguinal node dissections, etc.
Diane is correct in that if you have any desire to do Onco, Urogyn, or REI you should go for a program w/a fellowship not only for the sake of getting in that same program, but also for the networking and letter of rec factor.