
Totally agree, PROVIDED you know the individual involved is trustworthy and that your dogs will be safe. We never boarded our lot (again the cost would amount to the cost of the holiday!!) but were lucky enough to have neighbours across the lane (small hamlet) who we had a swap arrangement with. I did her lot (3 dogs, 3 cats and the house) and she did mine (varying numbers - we didn't take actual holidays, just days out occasionally). That worked really well. After we moved, we lost all that, and as at one point, I needed to take a long weekend away, I used 'professional' sitters. My dogs survived, but the carpets in the living room, where I'd asked them NOT to leave mine if they had to go out, didn't. I suppose the main objective was that my dogs would be okay, and not needing to be boarded.
I just urge you to leave a contact number with your 'sitter', and details of your vet including a note for them to show him you have given them permission to present them for treatment if needed.
So sorry about the circumstances that need all this but this IS a cancer that is, I believe, more often beaten, than not these days.
ps I worked in a boarding kennel for a few years, but still feel as above!!