I've done the Swashbuckler a few times too, this year the current wasnt really noticeable but sometimes it is. The race you are intending to do will have some small flat loops on the bike and then the part of the Swashbuckler run that is along the gravel path through the woods, there is a slight uphill at one end of the run and a steep short hill at the other (transistion end).
Padams - im not a great swimmer either. The drills from the 1 to 1 are my winter project I havnt been able to swim much lately so dont think I'll have improved much yet. Although I am more aware of what I should be doing. Hopefully I can swim the swim rather than survive it.