There's currently a promo for getting quadruple miles with USAIR for each stay. Does that mean I won't receive credit for the stays and/or hotel points on my Mariott rewards? If so, which is the better route to go? Should I go for the airline miles or the hotel credits?
You can't earn points and miles at the same time. There's currently promotions going on for both points (based on number of nights stayed) and miles (up to 4x). I'm sure someone has probably done the math to see which is "worth more", but it really comes down to your preference. If you have a ton of points banked already or wont meet the 20 night minimum to get the bonus points, miles is probably better.