WHAT DO YOU THINK??

Hello ladies, i was wondering what you think.. I am having a cermony out doors under a gazbo,in a back yard of a friends home. The back yard isnt very large but there is enough room for the chairs.(about 80) and 3 med. Tables for cake, bev,and for the sliced meat,cheese,vegs,and fruit.and punch
Do you think its tacky to have my guest at out reception just ot have the seats they sat in for the cermony? there isnt really any room for tables, and we arent having a sit down dinner, just snacks.....any comments would help ....oh the wedding is in aug.so it should be nice out side.