IMO, this isn't that strange. When I've gone camping with a group of families before, we've all parked at one site and left the parking area of the other sites empty for the kids to have a space to ride their bikes around in, that was off the road. They could have simply kept their two cars together at #49 to give the kids a place to ride bikes and play at #51.
IMO, if 2 Dads (or Moms) let 2 toddlers and 2 pre-schoolers/pre-K ride their bikes or play in a double car parking spot at a public campground that would be incredibly unsafe, not to mention against camp policy. Camp Hosts are known to give tickets or warn campers if they are not following the rules and there was a Camp Host on site that night. Anyone can enter the campground- pay $12 for day parking fee, and campground is known for guests visiting other campers and not sleeping there. In fact that makes no sense to me that in a beautiful campground, the playing area would be a double parking spot, but that's my opinion.
IMO, why leave #51 empty at night with the tent so close to parking spot, as other people could "borrow" vacant spots even it's reserved for others and even if it's for a few minutes- could wake up the kids.
IMO, #51 could have had visitors parked in #51 and departed sometime prior to LE arriving.
IMO, car of left side in #49 car appears to have a little girl's bike and a woman's cruiser bike on the roof. There could have been a dog there as well as dogs are allowed at campsite but who knows.
IMO, I see 2 kids' chairs, and 3-4 Adult chairs.
IMO, campsites #49 and especially #51 are tidy for 2 Dads with 4 little kids. They must have a bunch of stuff in their cars that IMO are parked as if they only had 2 parking spots with reservation.
Per Allergan statement, victim left company "last week- as of 6/25/18" so could have been week of camping. Colleagues or family or friends of #49 and/or #51 could have come to the campsite to visit- Afterall, victim and family were planning to move out of area per family statement to "start new life" and "start new chapter;" "final step..." The Adults chairs....empty double parking spots...tidy campsite...
IMO, I am not aware of any reward money offered by LE or anyone.