I'm mostly a kids/family portrait shooter...got asked by a friend to shoot a real low-key wedding. Only shooting for 2 hours -description was "it's a short service and the reception is at the same location. No wedding party, just pics of our family and some random candid pics after that."
I'm working on the contract now, already have insurance for my gear, etc.
My biggest question - how much lighting gear would you bring?
I have 3x manual speedlites (YN560IV), YN560TX to fire those. Plus 3x Alienbees (2x B800, 1x B1600) and YN622 to fire those. Have a good amount of modifiers and light stands too. I will be shooting this solo...so one big fear is lugging all the lighting stuff and taking too much time to set up. This is for a friend, so I'm not charging enough to justify an assistant or second shooter.
Besides the lighting stuff, here's what I have:
5d3, t2i
24-105L, 50L, 135L, 100-400L II
I think I know my answer - drive to the place first and scope it out. But any other advice? Would you bring the big lights for outside family photos and use speedlites for the reception? I'm a little worried about theft of all this gear (I do have insurance...but still).

