I hunt harding county every year and do both simply because we have access to a small chunk of land to camp on (not hunt on though). 35A has the little mo river that people like to be near. It is a mad house anywhere near there 1st AND 2nd weekend. There are also some really big ranches by land mass that have some great mule deer and people like to try their chance near them or get access (not likely). 35B is a little less crowded after first weekend. In my experiences, more opportunity for whitetail in 35B and the biggest one we have shot was a really nice heavy was in public land in that unit. There are more accommodations in 35A with Buffalo right there. If you are not scared of walking and want a few more opportunities, 35B is a better bet. If you want higher potential for muley deer, 35A.