Blue,
I have been in pretty much constant pain for about a year and a half now.
The pain level goes up and down but pretty much a good day would be a "2" on the pain scale. I don't want to start serious pain meRAB so stay with ibuprophen and use different rub-on pain ointments which seem to help a little. Ice is also my friend but not something you can't have with you always. Also I take aloe vera capsules, and glucosamine condroiten capsules which are good for the joints and no side effects like meRAB. Even the doctor agreed with that.
Luckily so far, sleeping has been ok unless I'm having spasms, but I feel better lying down than in any other position. Sitting is hard for me, and so is standing which makes sense since the pressure is on the lower back then.
We have similar diagnoses, mine is one level above yours, with pars defect at L4 (bilateral) and also degerative facet joints.
I think movement is good for keeping the stiffness at bay, but be careful what you do. I tried an exercise bike and that was a big huge mistake, since I was in the worse pain ever for a week. Stretching, and walking are what I do, every day and the more I do the better I feel.
I notice you're in California, which is great -we have the weather here where we can get outside almost daily.
Keep looking for bright spots, and I would suggest an MRI just so you have a baseline and some information for yourself. I think it helps to be informed and then listen to what your body wants and be Very Careful about every move you make.
Take care,
stephanie