Does the one hour plane ride and staying at a hotel matter?Um ...
Last time I looked only one team is traveling interstate.
Swans have probably played more big games than the Dogs at the G in recent years and will have plenty of support both with old South Melbourne fans and travelling fans.
I really don't think the usual regular season advantages of a home ground advantage - crowd, long flight travel, preparation time apply. The overwhelming build up of grand final week and how teams handle that must be a bigger influence.