I couldn't even imagine you being petty. Just let him know that what you just said: that you can get her to the camp and back everyday if she goes to the one in town but if he is insisting on this other one, he will need to cover at least 50% of the driving.
As for the job, you were working 4 hours a day 5 days a week on the ad job so why is he going balistic now? He just wants to make your life difficult because his must not be going so well. He wants to share the misery.
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory