Lol, Etiquette Snob here…
Ok traditionally, Pot Lucks are seen to be a no-no for a Wedding for a variety of reasons…
1- A Wedding no matter how casual, is still a formal occasion… and as such the Hosts should be hosting the Guests not asking them to “bring something”. Your Reception is supposed to be a Thank You to your Guests for Sharing in Your Big Day (not an obligation)
2- Bringing food to a Wedding can be a royal PITA… the logistics are almost always problematic, because of the time frame invoved… Arriving – Ceremony – Pictures – Then Food
3- Timeframe also means there could be potential issues with the quality of the food. Food should be kept at an ideal temperature before being served… usually places that one would have a group meal (Back Yard, Church Hall, etc) don`t have the facilities to keep a lot of dishes at their optimum temperatures
4- Because of # 3 above, most Venues will not let you just bring in your own food from an Unlicensed Vendor (usually has to do with the Licensing of the Venue, and local Health Inspection Laws)
5- EXPECTING your Guests to bring a gift… even if it is a gift of food… is seen as being Gift Grabby & Needy. Something a Wedding should never appear to be it is a Celebration and NOT A FUNDRAISER
6- And lastly, you will inevitably p!ss off some guests… they will find the whole endeavor to be a lot of work… and you should not be inconveniencing your Guests (first rule of being a Good Considerate Host).
Lol, on the “reality” side of things… you
ll find that having a Pot Luck where you expect the Guests to contribute (vs a meal that someone caters be that a company at a venue, or a relative for a backyard BBQ)... means that people will feel they have "done their share" even if it means all they brought was a jug of Lemonade. So you wont get much in the way of Gifts be they Boxed Gifts or Cash Gifts.
All stuff to take into consideration before you say YES to a Pot Luck Wedding
Hope this helps,
PS… No one says a Wedding Reception has to be a big elaborate sit down meal event… there are lots of other great ways to hold a Reception that don`t cost a fortune. All you really are required to provide traditionally is a “bite of cake” and a refreshing beverage … so if money is an issue, you can definitely have a Reception that fits the bill quite comfortably… it may not be what everyone else does… but it can still be a classy event.