Once upon a time, a few years back, when kids and myself were organising our first camping holiday in France I gave them the responsibility of deciding where to go and how we were going it and what they wanted.
We made a list which proved extremely useful but when we got it all sorted I left the stuff stored in boxes so we didn't have to go through the same thing every year. The boxes are sized to fit neatly in the camping trailer. The first thing on return from a trip is to dry off tent and pack the stuff away for next time.
I also did same for the bike camping trips.
This lot might help.
Tent: pitch outer first, one with a decent porch for wet day [and preferably a ground sheet in the porch], or place to store gear, or strip off wet bike gear.
Airbed[s] and pump.
Sleeping bag. 3/4 season but 4 season hot in 30 deg.
Groundsheet to put under the tent when you pitch outer. Thin plastic sheet protects under your groundsheet takes up little room packing.
Some spare pegs.
Stove, if you have kids, the small pocket stove is gem [2 of these fit anywhere, plastic container is small and put a small cigarette lighter in each one, it fits so you don't get caught] Gas available
http://www.ebay.co.uk/itm/MSR-Unisex-Pocket-Rocket-Stove-Serrated-Pot-Supports-Protective-Windclip-Shield-/371085123798?pt=LH_DefaultDomain_3&hash=item566665a0d6 You also get a small windshield for these that you can let the stove gently rest against for more stability. Very powerful.
Cookware: 4 person stainless steel. 2 person are much too small. Don't bother with a kettle, too much space taken up. I also ditch the plastic cups as I hate plastic cups.
http://www.ebay.co.uk/itm/Vango-Stainless-Steel-Cook-Kits-1-2-3-4-and-8-Person-/170555432346?pt=UK_SportingGoods_Camping_Accessories&var=470009760506&hash=item27b5e55d9aMicro tables: Try these...
http://www.amazon.com/GSI-55300-Outdoors-Micro-Table/dp/B0018BPKZUPacked away somewhere if you like our food: Small containers with some spices/seasonings etc, coffee, tea, sugar.
Melamine plates, but bring extra 1 for food prep.
Stainless steel mugs:
http://www.dhgate.com/product/best-100-pcs-lot-stainless-steel-coffee-mug/179389262.html#s1-0-1|1441123177Small chopping boards for food prep.
Small sharp knife and small serrated knife.
Corkscrew/beer bottle opener.
Eating irons, bring a spare set.
Small plastic container with some wash up liquid, unless you can buy some all in one liquid shampoo/wash up liquid/detergent to wash clothes.
Stainless steel flask: If you have a 1 litre flask, fill it with ICE- put the flask in the freezer for a day or so before you fill with ice. In hot weather its good for 3 days, warm weather 4 days and cool weather 5 days. After that, when you start out somewhere fill it with ice cold water. It will keep you cool during the day in hot weather. On extremely cold days fill with boiling water for tea/coffee. Or buy a chilled white wine and pour it into a cold flask.....it will stay chilled.
Torch LED, flat one fits under the seat. Have two, one to hang inside tent and read by.
A small cool/insulated car boot tidy is useful as a foot store, keep flask in it to keep food cool.
A tarp is also a good idea, only needs one pole but worth getting a big one to keep sun and rain off.
Chair is essential for comfort and if you like a beer. These are cheap and strap on top .
http://www.amazon.com/Quik-Chair-Folding-Carrying-Royal/dp/B005MAGUPM/ref=sr_1_3?s=outdoor-recreation&ie=UTF8&qid=1416505125&sr=1-3 First aid kit.
Some citronella night lights to keep bugs away. If you make a barbecue put some into it after you have done cooking. Very effective.
Spares are funny things but I do bring a few: fuses, bulbs, tools, luggage elastics, tape, cable, all fit in rear ducktail.
I generally fit all that lot in the panniers only, along with some clothes items. I tend to pack clothes loose to fill spaces. Generally all fit in the panniers with the gear.
Tank bag for some underwear changes etc and for phone, papers etc etc
Top box still empty. That gets food and stuff like that on the way. Also a rack to make a bbq. And some light casual footwear. If you have a pillion the top box will carry their stuff. A fold up backpack will be essential to but some shopping in on the way.