I'm in the parade this Saturday with my car club. Since part of the day will consist of sitting in the car for a couple hours, comfort and not having to worry so much about messing up the pleats etc. is important. I generally go with my PV USAK Ireland's National. The rest of my attire depends on the weather, March in Houston can be in the 30's or the 90's... sometimes on the same day!
For the 17th, likely the same kilt and similar thinking on attire, comfort and easy care. I have the day off, and will be at one of the big outdoor party venues most of the day.
There are some other receptions and stuff during the week I might get out the saffron woolie and dress up more for.