I had Dd's christening a couple of months ago and served picnicy food..will give you a list of what we served and if you need any recipes then let me know! Hope it helps:
Whole salmon cooked night before with lemon, butter, parsley and chives
New potato salad with lemon, olive oil and mint
Marinated chicken drumsticks (either Nando's bbq sauce or Sainsbury?s sticky BBQ Sauce) wrapped the end of the drumstick in foil so easy to pick up
Nigella's pea, mint and avocado salad (went lovely with the salmon and everybody commented on how nice it was)
Jamie Oliver's pasta salad
Salady veg/pitta bread and dips
French bread, butter and pate (yum yum!)
Quiche's (either brought, tesco's finest smoked salmon quiche is r. yummy or delia's oniony quiche if homemade)
Chicken satay's, mixture of indian and chinese starters
Crisps, sausage rolls and mini sausages
For puddings I did a really yummy apple Danish cake, chocolate brownies and flapjacks and strawberries and raspberries served with double cream.
For Briony's christening cake we got a photo cake from Asda for only £8.00 and was really lovely and original although the cup cake idea sounds fab.
For the children we gave them a box from here each with a colouring pad, colouring pencils, bubbles and stickers and also a couple of cut out teddy bear sandwiches, their name spelt out in alphabet biscuits (Annabel karmel's teddy bear biscuits recipe), Philadelphia cheese dipper, carton of organic juice and a apple and carrot muffin.
Here is also a list which helped when thinking of things to pack:
Plastic sheet to put on the ground
Rugs to sit on
Paper napkins, kitchen towels, wet wipes
ice packs and insulated bag to keep drinks and food cool
Paper plates, cutlery and cups
Plastic cartons for transporting food in (something I completely forgot until the day before!
Two lots of pass the parcel
Couple of inflatable bouncy balls
Parachuty thing (can hire from toy library)
Bubble machine (from elc)
Spare clothes, plasters, camera charged and ready to go!
Cardboard boxes for travelling food and items
Serving spoons
Changing mat
I have all Jamie Oliver's, Nigella Lawson, Nigel Slater, Delia, Gary Rhodes, Barbecue bible and loads more if you need any recipes. Either email me or post a message and I'd be more than happy to help.
Hope I have helped somewhat.
Jules xox