I had a L3-S1 fusion in February of this year. I was already fused at the L4-S1 levels. My surgeon doesn't do pre-blood donations as the cell saver used in surgery is often enough, in his opinion, to replenish what is needed (cell saver cleans what is suctioned and can be reinfused into the patient). He took out my old hardware from L4-S1 and put in all new hardware from L3-S1.
I was prescribed a bone growth stimulator at around 3 weeks post op and wore it 24/7 for the first 4-5 months. There are a few different versions and mine was one where I could wear it 24/7
I was in the hospital for 7 days. I had a back incision and a side incision, and I ended up eating too soon (side incision also means they move the insides around) and I bloated a bit. So I could not get up for 2 days. Otherwise I would have probably been out by day 5.
I had a hard LSO brace made for me about 3 weeks prior to surgery and then went back to them one week after hospital discharge for any adjustments. I wore that for 4 months. Not fun but it kept me in the right position when I was upright.
I was most comfortable in my bed with pillows under my legs. Hubby slept in the guest room for about 4 months (he's just happier if I can watch TV at 2am if I am up and he can still be on his own schedule).
The best things I had at home were a toilet seat riser and a grabber. The grabber helped me get anything I dropped or was out of reach. The toilet seat riser helped me not have to lower myself to standard toilet height. Both are available at your local large nationwide pharmacy.
Doing it alone can be tough. If you have enough frienRAB and family have them "on call" for anything you may need. They can pick up prescriptions, bring you food, do grocery shopping, etc as well as be on call for emergency neeRAB. If I was single and lived near family I'd have considered staying with them for 2-3 weeks post op.