Hello, Hip-hip Hooray! Obviously, you have come to a point in your condition that you have to have the surgery. I had a slipped epiphysis at age 15 from doing a TON of XC running after just shedding some childhood obesity. I had pins to reposition the hip joint (for lack of a better phrase) and was in traction for about 2 weeks. I was warned that in my 30s, I would have arthritis in that joint.
Like clockwork, arthritis set in and I could not walk more than 5 minutes without having to sit down and stretch. I felt like an 80-year old in a 30-something body. I finally bit the bullet and got the BEST surgeon (I got on a 1.5 year wait list as I wanted to have the BEST to do the surgery). That was in June of 2005. Lesson learned - I should have done the surgery sooner. The years of compensating take their toll on your gait, your muscle balance and your lower back. I am sure you have that now.
As soon as I could get vertical (with crutches/cane), I hit the pool and that is all I did for weeks. August of that same year I was able to get on the bike, but had to keep an eye on my hip angle. So I kept cycling to a minimum. If at all possible, find a warm place where you can have your recovery. I live in the Pacific Northwest where it is damp and cold in the winter months. I was off work anyway (short term disability), so I decided to take my wife to the Philippines, never been there before, so I did my recovery there. Being in a warm and humid place allowed me to be more limber, ditched the cane (funny enough, I can ride a bike, but as soon as I got off the bike, I relied on the cane).
I found that rehab was the BEST thing I could do to make sure the hip joint stayed healthy and strong. My biggest job was to get the left leg the same strength as the right. I invested in a power meter and focused on L/R balance - to this day, I am mindful of that. Just read your post and congratulations again on the new HIP.