One thing to keep in mind is that once they stop moving, their weight gain slows down. WAY down with an active kid. DS has only gained a handful of pounds in the year and a half plus since he started walking/running. So the carrier may work for you longer than you think. Obviously, you don't want to be doing that forever, though. :-) But I've found that sometimes all it takes to get past a phase where things aren't working is to do whatever it takes to avoid the difficult situation. Meanwhile, they get older, go through the next developmental leap, etc., and forget what they were doing before. So it might help to just plan to put her to asleep in the carrier every night for a few weeks, then start a new bedtime tactic. At about that age, I used to put DS in the carrier, turn off the lights except for a couple LED tealights, put on my iPod headphones and sing along to music I liked and dance in the dark. Really energetic dancing, actually, which goes along with what the PP said about matching her energy level.
If you're at all interested in getting her to fall asleep without nursing, she may be providing you with the perfect opportunity to move the last nursing a little earlier in the bedtime routine. After all, bedtime is already difficult and the nursing isn't helping her get to sleep, so if that feels right to you, you could get it over with now.
Another thing that comes to mind is that DS seemed to start needing less sleep and dropping naps in conjunction with starting to walk. A later bedtime, earlier nap time, or shorter nap might help.
Otherwise, I'd try to wear her out awhile before the bedtime routine. Plan something very high energy, and keep it going for awhile. Then make bedtime fairly low key and uninteresting. At one point, I realized bedtime was the MOST exciting time of day, because I was trying to pack in all these great things into the routine. While none of them were high energy, they were interesting, and when I simplified the routine it helped a lot. Now that he's older, he usually prefers to read after meals rather than as a wind down before bed, and once it's bedtime, it's time to go to sleep. It seems to work for him.