On a venue walkthrough, the couple looks at the arch, the light at the ceremony hour, and where the first dance lands. The more useful thing to photograph is the approach: where a car can actually stop, how far it is from there to the seats, what is underfoot for that distance, whether there is a single unpainted step somewhere in it, and how much of the path is lit at eight in the evening rather than at two in the afternoon when the tour happens.
The valley gives you specific surfaces to think about. Decomposed granite at outdoor venues, which behaves like sand under a narrow heel. Flagstone that has lifted a quarter inch at one joint. Artificial turf with a seam running across the aisle. Gravel side yards at Henderson houses that host ceremonies. A step down out of a chapel door that everybody clears going in, in daylight, and nobody expects going out. Add August runoff, a dance floor edge, and a cable run from a DJ to the nearest outlet, and the ground is not the flat thing the photos suggest.
What actually goes wrong almost never involves the couple. It happens at the end of the night, in the dark, to a guest carrying a centerpiece in both hands and a purse on one wrist, walking back to a car they parked before they knew where anything was. Or to a grandparent with a walker crossing sixty feet of gravel because the drop-off point was full. The fix is to assign one person to the parking path after the last song, put a light on it, and tell the family which relatives get walked out. That is not hospitality. It is the part of the night with the fewest people paying attention.
The next question is who is responsible if a guest goes down at a venue. It is not obvious on its face. There is the property, there is whoever ran the cable or set the rental chairs, and there is the couple who signed the contract. Tingey Injury Law Firm, a Las Vegas firm, names both slip and fall and trip and fall separately on its practice areas page, which is a distinction we had never thought about until we saw the two written out as different things.
Practically, this belongs in the timeline and the vendor notes rather than in any conversation with the couple, because none of it is what anyone wants to discuss two weeks out. No cable crosses an aisle, and anything that has to cross gets taped and covered. The path from the lot gets a light and a person assigned by name on the run sheet. Ask the venue in writing who maintains the walkway and who is on site after the reception ends. If a venue will not answer that question in writing, that says something about how the last event there was run.
If you are touring a place, do it at the hour you plan to get married, and walk it from a parking space to the third row instead of from the office to the arch. Do it in the shoes you intend to wear, and bring whoever in your family moves slowest, because they are the person the layout has to work for. Then tell us what you found. Venues change their lots, their lighting and their drop-off rules constantly, and the walkthrough you did in March may not match the venue in October.