Thank you Notes for Wedding Party Gifts

I would still write another thank you note. The thank you note you already gave them covers thanking them for being in your wedding, and for all the effort they put in for that (bridesmaids dresses, getting there early to do hair/makeup, supporting you during your wedding planning, organizing any pre-wedding events, etc). The next thank you note would cover the gifts they gave you.

I would write the second card since you're thanking them for two separate things.