It's only natural for us to worry when our babies go in for op's - even the simplest of one's! When my Max was castrated I was awful - and it was even worse the fact that it was me monitoring his anaesthetic
Anaesthetics are safest when the stomach is empty, so do not feed AJ and Raven after 8pm the evening before the operation, and keep them indoors so that they cannot get food elsewhere (or escape so you can't catch them in the morning

) you will not need to restrict access to water unless otherwise instructed by your vet. With the rescue remedy, I would contact your vet for advice, but I would be more inclined to use something such as a Feliway spray instead.
Transport them both in a secure basket. The basket needs to be easy to clean, and not so large that the cats fall about in them - for getting cats in and out, a top opening basket is by far the easiest.
Ideally the box should be regarded as part of the furniture at home, so that it doesn't become a signal for a stressful journey. Get the carrier to smell familiar and reassuring - put some clothing in that smells of the cat's favourite person, spray the basket and contents with a Feliway spray if you have one about half an hour before you leave, and wipe a soft cloth around your cat's faces to pick up the scent, and put this in the basket. You can also rub this around the carrier especially in the corners.
If your cats panic at the sight of the carrier, try to get them in safely and gently at the first try. Have the carrier close by but out of sight. Wrap the cat in a thick towel (preferably one which smells familiar) and pop them (and the towel) in quickly so that they cannot grab the carrier and get into a struggle.
Keep the basket covered with a blanket/towel during the journey as this will help them to relax.
Secure the carrier in the footwell behind the front seat or strap in using the seat belt.
Drive carefully so that the carriers are not thrown around and avoid loud music. Talk quietly and reassuringly and stay calm yourself - cats are great at picking up tension from their owners!
Try to avoid rushing and bumping the carriers against your legs as you carry them into the surgery.
Your cats will be admitted into the surgery, and checked to ensure that all is well before the operation and you will be asked to sign a consent form - this is a good time to ask questions and raise any concerns you may have. Your vet will either phone you once the operation has been completed, or give you a time to call for an update. Once the health check is completed, they will most likely have a pre-med which normally consists of a sedative, and a painkiller to relax them and help them through the induction period.
They should be kept in for a few hours after the operation until they have recovered from the anaesthetic.
On returning home they are likely to be a little quiet and may be unsteady on their feet. They will probably have a shaved area on their legs aswell as the operation site from the IV catheter. It is important that they don't lick at the operation site - if this happens contact your vet who should be able to supply you with a buster collar. check that the wound is not red, swollen or oozy, and make sure that any medication is given as instructed.
Your vet will probably advise that you keep them indoors for at least the first night, and they will appreciate a quiet, warm place to sleep.
Remember that the nurses and vet will be used to handling nervous cats - they see them every day

they will make sure that everything is handled in a safe, and as stress-free way as possible.
Sorry for the long post I do waffle when I get going
