NO.3 or NO.4 double coil or spring traps will work fine for either bobcat or coyote the setups vary. you are going to want to stake them in the ground very well. A couple of setups i use that work great is to place your bait on a tree stump or suspend it from a tree branch
place two or three traps around the bait on the ground.
By keeping the bait up high they will circle the bait and jump up at it increasing your odds of them landing on a trap
as for bait any animal organs are top notch or dead chicken,turkey,rabbit ect. during the cold months when there are fruits, berries, acorns, or insects. They strickly seek meat as a food source to give them lost energy fighting the cold.
Another trick i have used for both yotes, foxes, and bobcats is
through out some bird seed around the area birds and rodents will congregate around your spot and the scent will drive those predators nuts
Locations- Waterways, Dry or shallow creek beds,Game trails,Pond dams,Field borders,Field corners,Groves of trees,Eroded gullies,Near animal carcasses,Brush piles,Stream crossings,Under rim rocks
,Near old cowhide or bone pile,Fence Crossing
good luck