The things we do for a good groomer

lol. Well my groomer is from a local owned grooming shop. They have a mobile van. Well she was doing the mobile grooming for us well over 5 years ago when it was Just Callie and my moms rescue Sammy. Sammy hated grooming but loved our groomer Erica so it helped me know she was a great person. She was the first and only person to groom Penny, Joey and Ollie. Well last year she got tired of the mobile van breaking down so she refused to use it and only groom at the shop. Well it takes a bit over an hour for each pup normally a little longer with the girls and I refuse to leave all of them there for 5 or 6 hours. So we take two in and come back about 2 and a half hours later and pick those 2 up and leave the other 2. The issue with this is my house is 25 to 30 minutes away so it’s drive 2 to the shop, come home get the other 2 and take them to the shop switch them out and bring the first 2 home and drop them off and go back and get the other 2. It’s a lot lol. Would it be to much in one day to take all 4 but just drop 2 off and stay in town going to the park or the store with the other 2 and switch them out and do the same with the first 2? They seem tired after getting groomed and I don’t want to overwhelm them. Callie might be a bit more sore or tired because of her legs but I can take her stroller. How do you know what is to much for them in one day? Opinions?