If you ride 30 to 40 miles a day, then I would wager you have a LOT of biking skill by now! So when you show up for this ride you are nervous about, it won't matter what you are wearing or not wearing or how your bike is different from others' bikes....what WILL matter is that you know your bike inside out and are incredibly agile and comfortable on it and you've got the MILEAGE under your belt to prove your worth! That's worth way more than dumb fancy biking duds.
You'll probably be the coolest rider there.