As long as it's not illegal or unsafe, I'm all for gadgets and gizmos that make parenting and organizing events easier! I've not seen these suits in action, but from the sounds of it, they'd be a welcome sight.
For goodie bags, having a nice sturdy table with a smooth surface would already be a great help. Those craft bags can sometimes be flimsy and impossible to pack when they're overloaded! A long, sticky tape dispenser would also be handy for sealing all those bags quickly, especially if you've got little hands helping out. And maybe a big roll of cute stickers for the kids to stick onto the bags - an added activity to keep them occupied!