Keeping up With Cole: Dump Truck Bath

You probably know by now that Cole is not a good sleeper. Either he won't go to sleep or he'll go to bed and then just get up like he was just resting and want to play. And he STILL doesn't sleep through the night. He's two for goodness sakes! Luke didn't either till 2.5. You could say I'm tired. So last night was one of those nights where he went to sleep at a decent hour and then woke up and decided to stay up. He doesn't have a crib anymore or his own room so it's not like I can FORCE him to stay in bed. What can I do?
So I got this brilliant idea that I was going to leave him with daddy while I take a warm bath. I slept wrong the night before and my shoulders were hurting and a bath sounded amazing. Too bad that Cole also thought a bath sounded amazing and before I could even turn the water on her announced he was going to have a "dump truck bath" and carried his sand covered dump truck to the tub. I guess he was right; the toy did need a bath. And as much as he tried to get me to join him, there's just not enough room in the tub for mommy, Cole AND a big yellow dump truck.