I'm not catholic, so I'm wondering how long Mass is? If it is short- say, half and hour, and you can expect to be feeding people by 3:00 and out of the venue by 5:30 then a 2:00 time would be far better than 11:00 for me personally. If it is any longer than that though, and you would be feeding people around 4:00 to 5:00 then I as a guest would be expecting dinner and cake with alcohol and dancing to follow.
Again, personally, if it were me, I would go for a 1:00 mass/wedding, followed by a 3:00 tea/cake ceremony. Then guests could rise at their leisure, get spiffed up, have a light lunch, go to the wedding and have a nice snack after, then be home for a late supper or make plans to go out after. Nobody would be expecting a full meal, the workers would still be able to get in half a day (the locals at any rate) and it's early enough that people wouldn't be expecting an open bar.