assuming you have handlers or other folks kitting up with you, yes, your mates will assist if you need it (assuming they are able based on their costume).
There is always something I forget and I ask for help, whether its a volume adjustment, neckseal is not hidden properly, snap pops open etc etc.
That being said, its always nice to be able to work out how to get everything on yourself. Work out a process/order of operations in your head to help this along.
Good luck with your assembly completion and approval.