OP, I think it's just got too complicated with you offering lots of alternatives and basically trying to organise them. I can quite imagine that those already coming might also be a bit confused as to what exactly is happening and how it will be (simply because it's unconventional)
I'd simply inform everyone that the hotel requires a minimum two night stay or there is a Travelodge down the road (and you'll provide a free minibus to transport guests from the Travelodge to/from the Reception, with timings). Provide a link for guests to book their minibus place so you know how many need seats.
I'd probably formalise the plan for the day if you haven't already, so the timings and info are really easy for everyone to see. You're having an unconventional wedding day so I do think you need to spell out exactly what's going on....
7:30am - Lay on some croissants/pastries for those arriving who've had an early start driving to your wedding. I guess those staying at the hotel will have had breakfast included with their room (if not, you definitely need to provide something to see them through until 11am).
8:30am - Wedding Reception (only send this bit to those invited)
11am - Wedding Breakfast (menu attached, again only send to those invited, so they have some idea of the type of meal you're providing, is it breakfast, light lunch, just sandwiches, full on meal? I have no idea what you might be serving at 11am, but if it was a meal after a 3pm wedding, I'd have a good idea IYSWIM)
12noon - Toasts & speeches
7pm - Evening Reception with buffet
Leave it at that. Guests can book the Travelodge/hotel if they want and come if they want. You might lose out on a minibus deposit but if it's all laid out in black and white, everyone knows what the plans are, what you're providing, how much it will cost them. They're also responsible for just themselves (rather than a 16 bed apartment plus food, sleeping arrangements etc etc).