Why not just arrange a family get together? Choose a day over a weekend to give everyone as much warning as possible to keep that date free then have a party. In the summer you could have it in the garden, or all arrange to meet at a pub. Mr Spudqueens family have been having an annual family get together for years now. If there is a wedding that is counted as it! Otherwise we've either gone to someones house or gone to a pub which has a carvery. Not everyone can make it every year, but as many as possible turn up, and if someone can't make it one year they usually make it to the next one. Good luck!