I've done weddings and it is a huge responsibility and stressful time even when I'm using my own pit that I'm familiar with. I would not want to be responsible for someone's wedding food when not cooking on my own pit, knowing I had all the wood/fuel I needed, all the dry rub I needed, knowing where to purchase all the meat I need, and having everything I needed in the event something came up like poor weather or I needed to buy something at the last minute. I'd re-read everything in the previous posts and approach the whole thing apprehensively. I wouldn't look at this as a free trip to see family, I'd look at it as the most important BBQ you've ever done in your life...because it is. If you screw this up for any reason, even for reasons that are beyond your control, you will be responsible in the eyes of everyone, especially the wedding party. Good luck, I hope it works out, but if it was me...I'd pass on the whole thing.
Team: Smitty's Real Pit BBQ
2 Custom Built Reverse Flow Stickburners
Weber 26.75" OTG
Weber 22.5" OTS
Weber Blue 2000 Stainless Performer