I have been to two contests this year and had 9 holes in the first one and 17 in the second one. Now, thankfully I can withstand that with our numbers but many could not. Every band I saw had their fair share of holes and it did not seem to factor into ratings.
I also judged a contest a few weeks ago and not a single band there had everyone on the field. It is not going to be an issue with any judge worth a ....
If your band can march and sound well, you should be fine for ratings. If you can slap a show on the field in all this you should be commended regardless of ratings.
Wish you and everyone trying to make this happen all the best!