I've had dogs for most of my life and if a family member couldn't have them they've gone to boarding kennels. Not one of them has ever had an issue, no matter what their temperament. I've just dropped off our two German shepherds at a kennel we've not used before so it was all new to them. They left me without a backward glance, interested in the new people and the new place.
I've considered home boarding and dismissed it for this one reason. Kennels are more secure. I'm not criticizing all home boarders, there are some extremely good ones, but in a home situation there is a greater likelihood of something going wrong. Just this week I've heard of two professional dog walkers losing dogs. Doesn't happen in a boarding kennel.
The vast majority of dogs settle well in kennels. They have a routine, they are fed, exercised, played with and they usually enjoy their stay.
Book your dog for a trial run. Some places suggest one night but I'd suggest two so she has more chance to experience the routine. Explain to the kennel owner your concerns (they'll have heard it all before, trust me!) and ask them to ring you if she's distressed then you could pick her up early if necessary.
The staff are used to dealing with all types and temperaments and will take extra care of a newbie. The staff will be dog lovers and won't want to see a dog be upset.
It'll be the best thing you ever did, trust me!