Well, At 'senior' mountains, a long sled run in challenging terrain (glades, moguls crud) is a reality. You can't always get in and out so easily. And the test isn't just to the standard of your local hill, but the top terrain of the region.
Even at my little hill yesterday we had an incident deep in some unmarked 'local's glades' and it took some serious sled helmsmanship to get to the patient and get them out.
Ideally the test should tell folks That you're an accomplished toboggan handler/ tail-roper (and boarder) anywhere on the mountain, at more than one mountain. It is a regional standard, and if the course has any merit, it should signify something at anyplace, on any conceivable terrain, in your region (and hopefully beyond). It's not just sled skills either. Our Trauma packs are pretty heavy and bulky these days, and again, sometimes you have to ski them quite a ways on your back into some tricky terrain. I'd like to think a senior is a person you could always rely on to do that on any terrain in our region.
When you eventually get smooth at running toboggans in bumps, you'll realize that it is a pretty smooth ride down and not something so terrible to 'put a patient through.' But, it takes practice of course. And making a run that is clean and smooth for the patient is the whole point of senior training.
Actually, I have always noticed that competent snowboarders seem to have the EASIEST time in the bumps. The snowboard works well once things are headed downhill.
As for in the handles/ out of the handles, in small bumps/ low angle you can do it either way, but if they are seriously steep moguls on a steep slope, you'll learn quickly why being outside the handles is a benefit. Sounds like you experienced first hand why outside is better.
'Sides, it's just more fun and dynamic being outside the handles. You have to get comfortable putting your board in the nasty portions while the toboggan gets the smooth line, but once it clicks, you'll find running sled in bumps actually a lot of fun (a trained monkey can run a toboggan down a groomer after all).
As far as wishing you luck…if it was based on 'Luck' why would anyone pursue these sort of things?
Perform to the standards of your region and you won't need luck.