NASA--Yes, some coyotes are territorial 24/7/365, but not all of them all the time. I'll explain. The radio telemetry data we had on coyotes in the late 70's showed pretty much what you are saying. The territories were maintained vigorously during the spring/summer months; that also corresponds with the time of pup rearing. At this time the pups were also territorial in that they resided inside the territories as far as we could tell (we didn't have radio collars on the pups, only ear tags). However, we did have 1 family that lost their entire litter in 1977 to some unknown mortality agent. That family, however, maintained their territory just the same as the other adjacent families that still had litters of pups.
During the fall/winter (especially the winter) territory maintainence was much less intense, and use of the territory was restricted to about 1/2 or less in mid-winter. The colder it got the less the resident territorial adults moved. At colder than -30 degrees movement became very limited. This is also pretty much what you are saying, I think. However, the resident adults were still inside their territories.
This, however, is also the time of year that dispersal is occurring; mostly by juveniles. Juveniles comprise about 60-70% of the population. It is also the time of year that new territories could be established by disperser pups, because of less intense territory maintainence by resident adults. We never saw this happen, however, intuitively this could occur at this time of year. We never saw new territories established in the summer and judging from the way all space was occupied and the intensity with which it was occupied it wouldn't be likely to occur.
I hope I completely answered your questions, but if I didn't post back and we will continue until we get them answered or we get to where I don't know.