Def keep the bottles at 70F or a lil better. low 60's would be too cool & the beer either won't carbonate,or will take a long time. Mine go dormant at low 60's in bottles. The one thing to remember here is that normal yeast temp ranges don't apply to bottled beer. Save for the lower ranges.
And def don't follow the time lines in direction sheets. They're typically short. In 5 days,most often as not,only initial fermentation is done. It'll then slowly,uneventfully creep down to FG. Then give it 3-7 days after that to clean up & settle out clear or slightly misty. Then prime & bottle.