1. I know she will have to be confined, does she have to be in a crate so small she can't stand up?
No, but not so big that she could climb up the door and be standing. No taller than she is, or not much taller.
2. The vet said she could walk a little after 3 days, but no stairs and jumping. How much were your babies allowed to stand and walk.
To start, a short walk outside to go potty... on leash always. Watch her... if she seems to get tired, missteps, or seems painful... carry her back to her crate.(call the vet about being too painful) 5-10 minutes see how she does. Important not to over do it at this point.
3. Did you keep them confined the whole 6 weeks or as long as you didn't let them jump were they ok to walk around a little.
When you cannot watch her closely, I would have her in the crate. It depends on the dog too... is she one to take off running or is she a bit more laid back... it may be hard to keep her quiet esp with her buddies around... she'll probably want to play and run with them. After two weeks... walks can go to 15 - 20 minutes again depending on how she is feeling.
4.How big is the incision? Will she have a cast or bandage on? If so for how long?
The incision length depends on the extent of the damage and the skill of the surgeon. It really depends all on the dog and the damage done. Some may use bandages with a splint, some use casting material, Depends on the vet, the damage done, and the repair itself. Usually covered till stitches come out and depending on how well the healing process goes. May have to go in for bandage/cast changes.
5. If you are not home how do you know they are staying still?
If they are in a crate that severely restricts their movement and they are relatively calm anyway, they may be okay. If she fights the confinement, she may need a sedative for the first week or two. You could try leaving soothing music on loud for her to drown out any sounds that may normally excite her. Or do day care at the vet's (some offer it to post surgical patients) or have someone come in to check on her. Pretend you're leaving, but stay and see what she does. Or set up a camera...
Thanks for any input. I will be asking the surgeon the same questions tomorrow but I would love to get first hand experiences.
I know I will have more questions.
Yes, do ask your vet. They normally will have a very detailed plan on what to allow/ not allow again depending on all the variables.... and ask to discuss all this before they bring her out to you. It's very hard to pay attention when you're first reunited.... They should give you detailed discharge instructions in writing...
Hope this helps... and many prayers for her successful recovery and I'm sure you'll do fine

Note: Some dogs will be calm bc they know they are hurt...