What happened at Moselle IMO happened fast. I think that Alec was hosing himself down within minutes. Likely stripped down. Washed the weapons just like he said he did (whoops), wrapped them in the blue tarp, covered himself in the poncho, returned to the house to shower again and dress in shorts and a clean t-shirt.
Phones: IMO he wanted only to confirm that it was locked. Took Maggie's intending to delete the corresponding texts and calls but Maggie must have changed her access - seems he tried to open her phone by using the camera shortcut (unless that was a failed face recognition). Realized the phone might be his downfall and hot potatoed it out the window.
Drove himself to Almeda at a nice, LE friendly pace, stowed his weapons and clothes at Almeda, to be further disposed of later.
Jmo