FWIW, I've sent off the simple agreement between myself and the bandleader using verbiage that said no distribution etc. and left it at that. He can show it to the venue or not, even though I didn't include anything in there that would cause them to want/need to sign it. If there are any objections or further concerns they'll be voiced. Until then I won't worry about it and expect to get approval in a few days.
Regarding load-in, that would be my preference but I am not sure it will happen. The show starts at 8, the bandleader will show up around 7 ... but here's the thing. Some other group is using the dance floor for dancing lessons at 7:15 and I don't want to be running wires and be in their way, so I may try to show up earlier, around 6 and that means showing up way before any of the band.
Either way I'd want a contact name at the venue who's cool with that.