We are quite rural, and she doesn't have good internet connection. So she would txt me the numbers and I updated on the board, I left her the log in details in case she needed help.
She had my number, the vets, her sister is a vet tech, and she had a diabetic cat some years ago. So she had the possibility of getting help from various sources, she's a bit shy and she wasn't to keen on posting so I didn't push it.
Others have had their stand in carer post up daily for them.
I would add that I was gone for just under a week both times.
Absolutely she should not shoot under 50, but you probably want to give her a higher green or even blue number that she shouldn't shoot without consulting you first.
eg I was shooting green regularly the second time George stayed with my friend but I gave her a no shoot of 105, the reduction I took saw him run higher than I had been running him so it never became an issue.( 2016 january 20th I took the reduction 3 cycles before he went to the sitters on this occasion)
the first time I gave her a no shoot of 150, Georges numbers then were more bouncy. (If you look at the 2015 tab and dec 9, just before going to the pet sitter, he was due an increase, which I didn't take and then I dropped him on the day she went to him, he was running pretty high then so I didn't take the reduction to 2.5 until my friend shot)
My thinking on both occasions was that I didn't want to have to deal with steering him because he was diving below 50. Not because she isn't capable, but just because I didn't want to put her in that position.
You have to consider whether you feel comfortable with having Petey drop low enough that she will have to intervene with food to keep him safe, if you have Of course even if you take precautions and are conservative with dosing that might still happen, but you may not want her to push the numbers quite as much as you would.
All that said, she is your friend and you will know what the right choice is for Petey.