That is a tough decision. Weddings commonly have rehearsals, so you will probably get a lot of experience beforehand, and there may be a sizeable crowd where you won't have to worry about messing up. I find it easier to do something once I have it confidently "scripted" though. I played the part of best man at my friend's wedding, and was very nervous, but it turned out fine in the end (we rehearsed about 5 times through the whole ordeal).
I took a break before going to the reception to calm down a bit and also avoided the rush at the buffet, so it was a plus overall and I was glad to have participated.
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BAP: 103 aloof / 100 rigid / 103 pragmatic
AQ: 40 EQ: 8 SQ: 114
Aspie: AS-156/200 NT-56/200
RAADS-R: 189 total
Diagnosed 9/2013