I bought my dress online and it didn't come with a garment bag. I bought one from a local bridal store for $10 it's clear but it's decent. I don't like the fact that its see thru, so I will have to buy another one that's doesn't show.
If you want a ceremony then I would recommend vow renewal. Every resort has that vow renewal package. Or just the 2 of you dress up in your wedding attires for pictures: