If you drive slow put in nuetral then apply what brakes you have then you should beable to stop.I dont how much milege it is from your place to the garge but I wouldnt go far.Another thing is IF you have to drive it go during off peak hours of traffic.I had my jimmy towed 3 miles without brakes but I kept close enough infront of it so that I could use my truck to stop it.Takes some skill to do this.
Oh also can you remove your back tires and look at your wheel cyclinder to see if they are leaking?