Iv done alot of yote hunting at night. One thing about at night the yotes use smell more than sight, so make sure you cover up. Another thing you might try is to use a shot gun instead of your 22. lots of times you wont know the dog is around untell he is right in front of you. I really never use a spot light, only a head light. Iv had most of my luck before 9pm, but if the dogs are called in the middle of the night with a little wounded rabbit or somthing, thay will come. Yotes like to talk at night. Good luck.