I don't wanna be a spoil sport or anything, but if a place is posted no guns allowed, I simply won't give them my money. One of the reasons I no longer go to movie theaters. One of the reasons I refuse to travel into DC and/or Maryland (if I have to go through these places, I will not spend money there). One of the reasons I no longer bank at BB&T (BTW, we see where that has gotten them over the last couple years).
I have refused offers to join family and friends on multiple occassions for various events simply due to the fact that no firearms are allowed.
I'm not saying that you should not make that trip. If it is a decision that you and your family will need to make on your own. I'm just saying I wouldn't go.
ETA: I have no idea if they have metal detectors or not. I looked at their website to see if there were pictures of the entrance, but saw none.