My vet now has a portable, battery run scanner they use for cattle mainly - so next year will get my goats done (always have groups mated to kid on the same day anyway now). Would have saved me a lot of hassle this year if I had known... and maybe my breed champion goat would still be with us...
So, unless I had to travel unreasonable distances/to another farm etc I would now try and scan... not just for knowing if in-kid or not, but even more so if triplets/quads are involved... pregnancy toxaemia is a killer!