That's a good start. See if you can track the cat further to determine whether he's using the area to hunt or just passing through on his way to greener pastures.
Obviously there are going to be regional differences, but what I've found with bobcats here in Central CA is that there are areas where they are few and far between and areas that are just thick with them. Not that they don't evenutally show up EVERYWHERE hereabouts, including greenbelts and back yards in local towns. But you want an area that's dense with them. Places that transition from oak savannah to grasslands on the Big Sur Coast, for instance, are thick with bobcats. Seem to recall that SC has lots of similar oak savannah habitat though the terrain will be much different.
If you find trails with accumulations of scats, this marks a bobcat's home turf from other local cats. Very good sign wherever found.
Assuming there is a good population of cats where you are, stand selection will make all the difference. Keep in mind that they sneak in to the call, will use every scrap of cover and bit of shade available to them on the stalk. If the cover isn't there, if you don't pick an area that's a natural funnel to you to help them do this, you won't get many sneaking very close. IOW they'll most often won't cross large open expanses w/o cover, may hang up a ways out and you won't see most of them. (Not always the case, but mostly the case).
Bobcats here are usually not far from dense cover or forest (where there are also coyotes and ML and they're not at the top of the food chain). Myself, I've never called one from more than 1/4-1/3 mile off. Very different response to the call from the majority of coyotes.
Look for transition zones and multiple habitat edges, or game trail intersections. It's going to take some serious scouting to find the right spots to call in bobcats, but if you're in catty country, they'll be there, and the same stands will produce year after year.
Have fun and good luck
LionHo