Here's the thing about the Toy Story lot and Rope Drop. They start letting people through security on the Harbor blvd side at the same time they start letting you through security in the Toy Story parking lot. It will take 2-3 minutes through security and loading the bus. About 5 minutes to the resort. You will be behind about 10 minutes worth of people in line for the turnstiles at the park if you are THE FIRST people in line at the Toy Story lot. It's way simpler and faster than mickey and friends due to size and the nature of the system, but not the best option imo.
If you really care about rope dropping efficiently, I recommend parking at the Anaheim hotel (cheaper than official
Disneyland parking!) and walking over to the harbor blvd side bag check. Arrive at the Anaheim Hotel around 6:45, and you're golden. Take a relaxed 5-minute walk and you're at the bag check. You'll be only a few rows of people back at rope drop, and have a very stress free entry experience because you'll be relatively near the front of all the bag check and turnstile lines and can just enjoy the excitement of "we are about to go into DISNEYLAND!!" instead of having that panicked "the line to our right is moving 50% faster than ours is..." feeling. The walk should be short enough for you even with the surgery. It's WAYYY shorter than the Mickey and Friends situation right now. I've done all three options recently, Harbor is currently the best way by a long shot if your priority is rope drop.
If you want the stat breakdown on our last attempt on the Harbor side, here ya go:
Park open: 8 AM.
Arrive at Anaheim Hotel: 6:15. In line for bag check: 6:22. We were the first people on the property.
6:50: A pretty decent line has formed behind the bag check station now. Probably 300 people waiting to be let in at this point.
7:00: Rise of the Resistance Boarding pass scramble
7:05: They let us through to get our bags checked.
7:07: We are the first ones in line at the Disneyland park turnstiles
7:33: Letting us through turnstiles and into the park
7:35: First at the rope between astro orbitor and plaza inn to head into tomorrowland.
8:03 (Strangely late rope drop that day!): rope drops, let the stampede begin.
Hope this is helpful! Have a great trip!