What are your options?
Don't go to the meeting
Take her with you (and a lot of blankets!) - sounds daft but I took my whippet to my mother in laws, left her there while OH and I went out for a meal got back and there were pups - MIL assumed they were there all along and had not noticed the birth occurring in her kitchen....

Ask someone to house sit (not my MIL)
CCTV remote access and give the Vet a key to the house!

Any others?
Aside from confirming pups are alive I don't see a vet check being very valuable 9 times out of 10 at this stage