Seems no one mentioned it, but it's possible to spawn Pegasus vehicles really close to you. The game no longer picks the distant Pegasus spawn point.
For example, if you are located at the Hospital Helipad and you call Pegasus for an aircraft - it will be spawned right next to you at the Hospital. Previously, you would have to drive to another pegasus spot.
This leads to an interesting mechanics. If you need a barricade or just a bunch of vehicles (for a stunt?) you can just spam them at any suitable Pegasus spot.
You won't be able to drive them, but they won't despawn as long as they remain in field of view of at least one person.
I was able to place 6 Dumps close to each other and it didn't require another player.