150 tanks are usually 6 foot long. So measure your empty space in the van and see if it will fit with the door closed. If it does, you should be ok, but also dont forget the stand and canopy have to go somewere.. If I were you, I would take both. I know it might be more gas, but if the tank will fit in the van, then you are covered from rocks comming up off the hwy or what not.. and you will have room in the truck to put the stand and the canopy. Remember, the stand is usually about 2 inches longer and wider (depending on the stand maker) than the tank it self.. Best bet is to take both vehicles. No since taking the chance of getting the tank chipped or worse cracked by something that might fly up off the hwy..