Anyway - In the end we decided to go away for a week up to a cabin on the local mountain - Springbrook, where it was going to be at least 7 degrees cooler than the "close to 40 degrees" we are having in Brisbane at the moment, for his birthday and while were were there invite friends and family up for a lunch time gathering to celebrate.
We took up all our own crockery, glassware and cutlery - and even though it was a fair bit to lug up and back and a fair bit to wash up, it gave people time to bond over dishes and lowered our rubbish considerably. For 30 people for lunch, 3 people for a week, and 6 others overnight - we only generated one and a half bags of rubbish for the week, not including recyclables. I thought that was really quite good!
We tried to buy what we could in glass containers rather than plastic and since most of the food was real food it didn't come with much packaging and thus there was less waste. We did a make your own filled roll for the main meal and people bought their specialities along as well - so we had scotch eggs, pork pies, a yummy cheese ball, an awesome slice, antipasto platter, nibblies of all sorts!
We lived on the leftovers for the next few meals (this was planned!)
We used real serviettes instead of paper ones.
Green-ness: 5/5 for using things that can be washed and used again
Frugal-ness: 5/5 Turns out to be much cheaper if you already have the bits and pieces!
Time cost: A lot more time to pack, wash and repack all the gear - but it was good bonding time for those who shared in these activities.
Skill level: Lots of thinking of alternatives!
Fun-ness: Great fun to only have a bag and a half of rubbish - made us feel quite virtuous!