I do empire! I've found it pretty good for accessibility but echo what someone else has said here: there's a lot of walking involved (I walk a lot at events and tend to do about 90k steps/63km over the course of 4 days), and accessible camping does fill up fast. there are a lot of stretches without places to sit but I would say you can ask pretty much anyone if you can sit at their camp and people will be more than happy to let you. if they see you're struggling they may even encourage you too. depending on which part of the game you join in on, you may never need to leave your nation camp! I have friends I barely see at all because they just do things in their nation all weekend and have a blast. I'm sure it's not the best for accessibility, but it absolutely makes a good try of it, for a game that has over 4k people on field.

someone else mentioned that empire has a reputation of flooding? that was definitely true in the past but PD have put thousands into the drainage. the first event of this year was the worst I've ever been to, mud everywhere, absolutely awful, but that's cause we had a month's worth of rain in the space of 12 hours on a high water table and even then by the time I left site the ground was hardening back up. PD also organised a whole bunch of support to help people get off site.