There are several ideas on how to carry bikes and
a cargo box on the rear of a van. Some that I know of are:
Wincrasher's add a bike to a Stowaway here: http://www.classbforum.com/phpBB2/vi...hp?f=12&t=3422
My sliding cargo box with bike rack here: http://www.classbforum.com/phpBB2/vi...hp?f=12&t=2616
The swing away bikes and cargo box Velo Combo from Nicova http://nicova.ca/en/
The slide out bikes and cargo in same box from http://www.letsgoaero.com
The Blue Devil Steel Basket Cargo Carrier & Bike Rack http://www.discountramps.com/hitch-carg ... /BCCB-BDX/
The attach the bikes to the rear doors idea here: http://www.classbforum.com/phpBB2/vi...hp?f=12&t=3453
You could attached a small cargo box to an unused door or keep the cargo box under the bottom of the doors like a 8" or 10" high box for example.
They all give access to the rear cargo doors on the van. Slide out, slide across, swing away or unload the cargo tray. There are pros and cons associated with all as well.
Things to consider:
Effect of a hitch extension - bottom of this page: http://www.visualsc.com/hitch_calc.htm
Blocking license plate
Blocking van lights
Effect on van handling
Ease of use
Ease of installation and removal
Parking and/or overall vehicle length
Area needed for slide out or swing away
You can put bikes in the rear on some extended sprinter conversions but might have to unload the bikes to get to other gear. You can put bikes in any camper van if you don't mind interfering with the living space.
There are front hitches and folding bikes to consider also.
I've decided to put together a slide away cargo box with bikes on top using off-the-shelf components - no welding needed etc.
Here's what is needed for my van and needs:
Large enough to fit my specific gear.
Aluminum box with rear access not top access. (bikes on top)
Slide away needing less than four feet of space behind van for full operation. (fit and use in my garage)
Van lights not blocked - no additional lights needed.
Van license plate not blocked or minimally blocked - no relocating license plate needed. (leave the box and or bikes in the garage easily)
Stable with two steel support tubes not one center steel support tube. (no wobble)
Make it as light as possible. (aluminum box for example)
Keep it as close to the rear of the van as possible. (2 feet or less addition to overall van length)
High enough ground clearance. (both for appearance and function)
I'll detail the parts that I've purchased or going to purchase and the assembly in followup posts.