I never did use a walker, but I used :
Two crutches for 5 days.
One crutch up to 14 days out.
A cane for about 4 weeks, but a little less each day.
By 8 weeks, I was back at work (easy desk job) but riding the recumbent bicycle at the gym and walking "around" fine. No big hikes, but no problem at the grocery store either.