What mini vans are OK for towing a trailer?

I have a small hard wall box style camping trailor. I plan to purchase a van to pull the camper and also as a back up vehicle. I have lots of grandkids and need the room (7 seater). Will most vans be able to tow a camper? Does it matter if it's front or rear wheel drive? I know my friend towed it in the past with his Explorer. Any ideas out there would be appreciated.