Welcome!
Oooh family Cali *wanders in with a cocky swagger*.
We've had ours for four years now, and are still learning - so in no way is this 'expert' advice. Equally, we all have different use cases, and with the kids constantly growing up, it constantly changes year on year (we started with a 1 and a bit year old, and now we have a 5 and a bit and 3 and a bit year old).
First rule of thumb is find a use case for an accessory and THEN buy it - otherwise you'll end up with tonnes of accessories that all do things slightly differently/better than the other, and end up juggling both or more.
For us, we're really keen on space utilisation but wouldn't recommend any of our tried/tested upgrades to a brand new owner. The ones I can suggest though are a bit more mandatory:
1. Some form of
boxes for the cupboards. They just need to fit into the cupboard space so you can pull things out in one go to rummage around. Expensive upgrades exist (50Nord), but certainly not something to splash on before you know you want or need to.
2.
Carpet. My word, this was a gamechanger for us. Take a look on the club store for Brandrup carpet (German made). It turns the entire living area (and boot for that matter) into a far more livable area. The same goes for the front, albeit you can use cheap/nasty ones for there given the pummelling it gets. Our T6 has a light beige carpet which was a terrible choice for a camping leisure vehicle.
3.
Seat Covers. On the same vein as the terribly coloured driver cabin floor, so too are the chairs. They all stain incredibly easily and as ironic as it is, to protect them they need to be covered. With kiddos, the chairs are constantly climbed on (mine wander over them to get into their car seats for example). I took them off the other day for a gander, and they're still immaculate underneath. VW do some 'cheapo' ones that we're still using. More expensive ones exist like Brandrup Second Skin, etc
4.
Windscreen Wrap - the blinds in the Cali do a good enough job, but on a campsite you might want a full windscreen wrap - it can keep the heat out better, and additionally is far more private (the built in ones still have the odd peep hole.
5. Packing Cubes - a good shout, but dont let it fool you into overpacking. If you have the wardrobe filled to the top with cubes (often happens with a family, trust us
), then it all needs to come out to get to that one at the bottom and all that faff can really kill the fun.
Onto your specific ones:
1.
Bikerack - we run both a tailgate one and a towbar one. Our reasoning was simple; We use the tailgate for bikes, and the towbar for a storage box. If you have a tailgate rack and dont have a towbar, it's probably worth off skipping the towbar for now. They're expensive to fit aftermarket and the only downsides are that you need to pick it up higher to load on, that they sit proud of the roof, and you cant open the tailgate with them on.
2.
Shoerack - dont bother. Those corner ones are so small that they barely hold two peoples shoes, let alone four, and they take up valuable space. You'll quickly find you want every nook and cranny for storage and shoes can live in a variety of different places on the floor.
3.
Windscreen - If you do, dont spend alot. This is one of those 'too many accessories' bits. When we go away, we almost always take either a pop up tent (2-3 day trips) for car seats, or a full blown drive away awning (4+). The awning is a godsend on space - but it's just more faffy. But a wind break on the awning would be pointless with a full drive away awning. It depends on whether you're doing short trips or long trips I guess.
Hope some of these help.