Seems to me the subject 'gear' carried on to the grounds was all contained in the shooter's backpack which was recovered on the rooftop not far from his body.
(I saw the backpack photographed with the body and
recommend caution when it comes to details by DM).
Reportedly, this would have include the rifle, a remote, range finder, cell phone. I don't recall he was seen with anything else when walking the grounds. Also, I think the bike was early speculation.
I believe his excess ammo was located inside his Hyundai, that like a Van allegedly connected to TC, wasn't discovered until later-- long after the shooting. MOO
ETA: add link 7/18/24
Crooks appeared to spend at least some time preparing for the Trump event. He bought ammunition on the day of the rally, stopping at a gun store in his hometown of Bethel Park to pick up 50 rounds, according to a joint bulletin issued this week by the Department of Homeland Security and the Federal Bureau of Investigation, which is leading the investigation.
He built three homemade bombs – two found in his car and another in his home, according to the bulletin, which was reviewed by Reuters. In the preceding months, the bulletin noted, Crooks had received “multiple packages, including some marked as possibly containing hazardous material.”
