When my wife and I got married we focused more on what type of marrage we wanted and I must admit did not give a lot of thought to what CIC might think. I suppose we figured that because it was organised the way we wanted it would appear genuine and not like we were trying to satisfy any external influence be it officials, family or peers.
We organised the weeding at my wife's Church (Unitarian) in Canada. Used the function room within the confines of the Church building, got a local restaurant/catering company to come in and do the food, and kept the invites down to just immediate family and a few friends. The main thing was we wanted a very intimate wedding where everybody would be together on a long table at the wedding lunch. The minister was very helpful and we designed our own 'humanist' style wedding only having to leave in the official bits. We had a bit of music playing at key parts; start, signing the register, and end. And got relations to take loads of photos. Unfortunately a lot of my guests could not make it in the end as they had to come from the UK, but my parents offered to organise a UK based function recently so anyone who could not make it to Canada came to that one (although that was done after our application was sent off).
For the wedding in Canada, I think we paid about $700 for the catering for 20 people (Starters, Thanksgiving style meal, mini-cake stylee deserts), $250 for the minister/church, the cake we had done a Sobeys so probably about $20, the flowers were kept pretty simple and we laid out and packed up all the tables etc. I think the honeymoon stay in a hotel and the subsiquent 5 days holiday cottage was more expensive.
I felt more relaxed at my own wedding than when I was best man at my brothers. Probably because we were totally in control of everything, and it turned out exactly how we wanted and everybody said they had a fantastic time.
Hope this helps