I've only left the house twice in the last 1 1/2 years without compression stockings. The first attempt was a disaster, but I was not well controlled at that point. I was taking Midodrine when I tried it the second time. It went better, but there was clearly a difference.
When I'm really symptomatic, I'll wear an abdominal binder in addition to the compression stockings. That makes a big difference, but it also makes me nauseous, so I limit that only to times when I really need it.
So in my opinion, both stockings and a binder are helpful, and when used in combination they are very helpful.