It's that time of the week when I remind you about joining occupations on Sunday.
I'm afraid that living in London I've only been able to scout out access info for Occupy LSX. Perhaps if you visit one of the other occupations you could post access details in the comments below?
If you're worried about getting cold and needing to get inside and warm up: The occupation is simply surrounded by cafés. There's all your big chains (Starbucks, Costa, Pret, Paul, etc) within sight of the tents. Tents are actually erected outside Starbucks, Paul and Tea, you can get from the occupation into these outlets within 10 paces.
Accessible toilets: There's an accessible toilet in Tea (I noticed it through the window as I was pushing past, I didn't go inside and scope out the interior of the cubicle). There's also an accessible toilet in One New Change (which is apparently open 24 hours). I wouldn't be surprised if other cafés also contained accessible toilets but they were the only 2 I found. The Costa across the street has a toilet, but not an accessible one; it's in the basement with no lift. Might be useful to know for anyone that can do stairs but is likely to need the toilet urgently. There are Portaloos on site but I didn't see an accessible one. According to the Changing Places website, the nearest Changing Places toilet is at the Tate Modern 0.45miles away.
I also understand the people who want to camp at the occupation for a night can ask in the Welcome Tent and be allocated an available tent. I can't see why someone with fatigue issues couldn't get allocated a tent for one hour if needed.
Hope to see you on Sunday.