Honestly, the main things you need to have for a fairly traditional wedding ceremony & reception are;
Outfits - for the wedding party
Someone to marry you (church, priest etc)
Someone to take photos
Made decisions about readings/prayer/hymns/what have you
Transport to/from church and reception for bridal party members
Dinner in the hotel & evening food (don't skimp on food it's the main thing people remember!)
Most reception places will have a timeline they suggest to couples, so just go with the flow that they're used to. They've done all this million times before.