Killed a nice buck at 430 but I couldn't find him. Will it be alright to let him sit over night till 6 ish
If you "killed" it, why wait? Go out about 10 or 11 and get him if you want to give a little time. Waiting till morning is just a longer invite for yotes and wasted meat.
Do not regret growing older, it's a privilege denied to many!