Well, if it's driving vacation maybe he'd like a trip! You'll need to know if the water is similar to your home or bring a couple gallons of it in case it's not & a siphon or something to WC. A gallon jar is so much smaller you'll need to be on your A game, either testing or just changing water often. Bringing pets can be a PITA, you can't just "have fun" away from home. I've brought pets only a couple times, mostly a good experience but not always...You still want to have fun!
If he wasn't so new & young I'd for vote leaving him home (I have no frog experience). You could also just have the petsitter feed a very measured amount of food every other day & do a water change when you get home. Be very clear: 1 pellet or whatever every 2 days. I used to leave little cups of food for each tank. I truly don't think 5 or 6 days (3? feeds) would stunt him or hurt him but it's a judgement call.