I don't get the timing. Unless he was thinking it would be easy to drive down to St Ann where the other ied's were at 0345. Why would he want to be where the other were left? Wanting to visualize target before remote det?
It's odd. But, he was clearly not stable so it's hard to know what he was thinking or if his plans just got delayed. Maybe he had second thoughts or couldn't work up the courage until then? He had to know he was going to die doing this. Maybe it took him time to finally decide to do it.