My opinion is, it will affect them some. If they' ve gotten used to the 50' s weather, the 70' s is gonna make them lay up during the hot part of the day. I' d focus my attention close to bedding areas early in the morning and try to catch them coming back from feeding areas. You may also try mid day hunting around water sources. The warmer weather will make them need more water. I' d probably spend the afternoon scouting out other areas or relaxing in camp.

Just my thoughts.