For the faster wide angle stuff put the gopro on r3(720 50fps) setting. I use it when mounted under the stem, looking through the forks.
For a taller shot put the gopro on the r4 (960)setting. I use it when on top of my lid or on a chest mount.
The r4 setting gives a colder looking finished video so I normally sharpen it up and change the colours a bit in Vegas. You can do this on the Track properties or other (hard to say without Vegas in front of me).
Also I don’t know how familiar you are with Vegas? When you open a new project or even mid way through you can go into project properties and tell it to match them to the original video file, so no need to adjust frame rates/definition manually.
I wouldn’t bother going up to r5 (1080) on the gopro but then I’ve got a crappy computer which struggles to process 720 videos and watching them back on youtube would be impossible