Many bear hunters use bait or dogs, for calling I prefer a cub in distress although they will come to rabbit distress calls. I make bear calls using a fairly heavily bladed raspy call,go a little at a time until you get it right as you can easily ruin a reed, and you have to experiment with the barrel to get it the right length. Once you have it correctly bladed and the right barrel, it makes a realistic sounding cub in distress, I use a LV002 JC reed although some use a medium voice, (sounds more like fawn balling/distress though). Once you start calling to a bear, you have to keep calling, if you stop calling the bear will lose interest. Sows tend to come in more agressively than boars, it is not a sport for the faint of heart if you have a sow come charging in.
Personally, I advocate the shooting of boars only, abandoned cubs if they survive,can become nuisance bears, more of a problem when the cubs are young, in the spring, than in the fall.
