Hi Barb -
With the proliferation of "destination" weddings, sometimes all it takes is a quick call to the bride, groom or a family member.
When my daughter got married on the lakeshore at the groom's family property, about a mile from parking, they provided transportation via two ATV's for those who could not make the walk. It was lovely. And at the end of the evening they were able to transport members of the wedding party to rural their lakefront motel a couple miles away, safely and with no worries about if anyone over-imbibed. Having lived with many people with mobility issues for most of our lives, we try to be inclusive - and it doesn't hurt to remind anyone that "their" day was only made possible by the family who came before.
Another note about outdoor concerts - a call directly to the venue ahead of time often resolves that issue as well. People are nice if you give them the chance! Just don't wait to approach the Event Security near opening time - their job is usually to enforce the rules, not make exceptions.
Last Spring we went to see Willy Nelson, it had rained hard for days before, the open ground was soft, and the venue (which did not allow chairs) made sure those who needed a place to sit solidly on a chair could find a spot for it, and even came up with folding chairs. One of our local parks, if they have to move the concert from the amphitheater, offers rides up a fairly long hill, for those who cannot make the trek.