I just hope it goes smoothly, I've heard that Highlands can be rather edgy round calving time - eek.
Yes, be VERY cautious. However well you know that cow, she can be a demon when consumed by mother love hormones. And in your case, a demon with very
very long and dangerous horns. Do not attempt to approach, or get between her and her calf, on your own until you have sussed out how she'll be.
BH keeps an iron gate between himself and one or two of our girls who are very protective for the first few days. And has me nearby if possible, or at least know he's 'going in' so I'll come a-looking if he doesn't return!
Usually you'll get a head shake and snort of a warning, but some just charge, so take no risks.
But don't let that spoil your enjoyment of what will be a thrilling time!
And, even when your herd numbers in the thirties (as ours now is), they are still all precious