2 drop ins/day for dogs?

Hi all, I’ve been sitting on Rover for over a year and feel like I frequently run into people asking for check-in for their dogs 12 hours apart for days on end. I personally don’t think this is enough, especially when a dog is crated during the time I am away. I just got a request for two large poodles to check on them at 7:30 AM and 6 PM for five days. Can someone let me know if they would accept this request? I have done it before and end up feeling really guilty for leaving the dogs. Or can someone let me know what a nice way to decline is?