I totally think you can have a party... Not weird at all... Invites could be worded to say how excited you are to finally celebrate your wedding blah blah. I also don't think it's weird to have pics done. I actually don't have a single shot of me alone in my dress and I think about it all the time, about how I want to pay someone to take a few of just me. If you did a renewal which I believe you can do anytime (we did a mini renewal on our 2 yr anny with the reverend who married us on the beach just us and the kids) you could get dressed up and get good shots

I say go for it! Who cares what society says!