This is the conversation that determines whether a property is suitable at all, and it needs to happen before anything else. A resort coordinator who has run four hundred beach weddings has almost certainly never handled this, and that is not a criticism of them. It is a reason to raise it first rather than last.
Guru Granth Sahib Ji is not decor, not an object to be stored, and not something to be moved by hotel staff for the convenience of a room turnover. Every practical arrangement follows from that, and a property that grasps it quickly is usually a property that will handle the rest of your wedding well too.
Floor seating for a hundred and sixty people is a very different room requirement from a hundred and sixty on chairs, and every capacity number a resort quotes you assumes chairs. Ask for the cleared floor dimensions rather than the seated banquet capacity, and factor in carpeting or matting, which most resorts will need to source.
At the Fairmont Banff Springs we held the Anand Karaj in Mt. Stephen Hall, a room with stone arches, soaring ceilings and stained glass. It suited the ceremony in a way a beach gazebo could not, and the property understood the requirements without needing to be persuaded. That is worth a great deal.
Most families bring their own from home. Flights, accommodation, honorarium and visas all need budgeting, and at some destinations the visa timeline is the binding constraint rather than the cost. Start it the moment you have a date.
If langar matters to your family, raise it at contracting. It is not a plated banquet and most resorts will instinctively price it as one. The properties that handle it well are the ones with a standing Indian kitchen.
We are a travel agency, not a religious authority. Everything here reflects how we have handled these arrangements in practice with families and with properties. Your family's own guidance, and your gurdwara's, comes first, and we will plan around whatever they advise.