I’ve got a LWB T5 as my daily driver, wouldn’t be without a van now! Fit’s the 5 of us fine (I’ve got the bench seat up front so can seat 6 if need be). LWB will take bikes in the back without wheels off, so there’s room for 6 bods + bikes and kit for days/weekends away. The rear seat is on a quick release so is a 2 minute job to remove should I need to for work, I’ve also made a bolt in camper unit and bed for weekends away camping. we have slept all 5 of us in it on a few occasions (no pop-top or awning), which is snug but doable for the odd night, usually when travelling somewhere, although we’ve now got a decent driveaway awning for the kids to sleep in. Drove to Greece and back in it last year and it was pain free. Mine gets 600 miles per tank (T32, 105ps), no matter how laden or seemingly how I drive it, it’s always 38mpg.
Make sure any that you get (if going 2nd hand) has full service history, they’re long life service intervals which need to be kept to apparently. Cruise is an easy an fairly cheap retro fit if you want that and find the right van that doesn’t have it, air-con on the other hand is a fortune, so if that’s important make sure you have it from the off.
I prefer barn doors for loading, but a tailgate would make a bike rack easier. If you end up with barn doors you’re pretty much restricted to a towbar mounted rack.
Do it, you won’t look back!