depends what the bears are use to eating. try to stick with same types of foods.
if they are dump bears and use to human food, anything sweet will work.

if they usually only get berries, try pie fillings, blueberry, apple, peach. cherry.

popcorn with bacon grease works, fish, rotting meat, gut piles. ( slaughter houses might help ya out )
the worse the smell the more they like.

saw some stuff called dead horse , comes in a sealed bag, pin hole it and hang...will do a drip, brings em in
also licorish (sp sorry ) smelling sprays or liquides work well.

if your gonna film your hunt, i'd suggest building a log enclosure or pit.
1/2 barrels have a trashy look ( but very effective for bait sites ) just look bad on film.

some use full barrels and cut holes. can judge the size by the size of the hole.

cut some logs 6 ft and lay around so you can judge size
also some sticks at 3 ft and 4 ft hights will give you an idea of how tall.

good luck.