If he is truly resting, not moving around, not being taken out of his crate, and kept on anti-inflammatories, he may be OK until Monday. But if you want to see about getting him surgery sooner, I will tell you how they do it here, and it seems likely they would do the same thing there. I am in a large city in Texas. Here we have a regional referral hospital where regular vet practices all over the city and in outlying towns refer clients who need more advanced services than they ordinarily provide. The referral hospital has all board certified specialists, including several board certified surgeons. They are not on duty all the time, they normally work the day shift. The emergency hospital operates in the same building during the hours the referral hospital is closed, and if they get something like a dachshund who has just gone down in the back and needs immediate surgery, the vet who is working in the emergency hospital calls whichever surgeon is on call, and the surgeon will drive to the hospital and do the surgery any time of the night or weekend.
I am not familiar with the Bay area, but your weekend emergency hospitals will be familiar with each other and what is available on the weekend. So you could probably call around (if you have not already done so) and see if there is a facility that has a board certified surgeon "on call". Assuming you find one, the next thing would be to talk to the vet on duty and explain your situation, see if they advise you to bring your dog in, and they will take it from there. They will examine the dog and determine if the dog is stable enough to wait till sometime tomorrow or even Monday, or they will admit the dog and observe him for any change, and call the surgeon if he seems to be losing deep pain. Or possibly they may examine your dog's neurological signs and send you back home for continued rest.
I don't think you are being hysterical, and I think it would be a good idea to make as many calls as necessary to see what is available in your area. You can also tell them that you are prepared to pay for immediate surgery if indicated. Surgery is never guaranteed, but having it done by a board certified surgeon should give you a better chance of a successful outcome. A facility that has board certified surgeons is likely to have an MRI, too.
Here is a link about crate rest. Note that it says you must carry him out to potty, he can't sleep with you no matter what he's used to, and he needs to be in the crate 24/7 even if you feel sorry for him or if he whines...this is a time for tough love...
http://www.dodgerslist.com/literature/CrateRRP.htm