I run 265.65.18s, so I can technically still drive on my bumpstops. As Blue said, however, saying you can do it and actually doing it are two different things.
A company called Green Oval Experience used to make an emergency kit you could use to manually air up the struts. I think they no longer exist. But it appears to be somewhat easy to DIY a kit.
The basic idea is that somewhere near each strut you splice a new airline into the factory airline using a T-fitting. The new airlines run somewhere convenient like the front and rear bumpers. If something terrible happens to the EAS system, you can use the new airlines to manually air up each strut using an external air compressor.
Here's a post on it:
have a plan to **** everyone you meet. 10 years in on my 2012, which has been to hell and back, and I finally had my first air suspension failure. I was somewhere above 13,000 feet on Kendall Mountain near Silverton, Colorado when the Rover had what sounded like a fart, then a small pop and...
www.landroverworld.org
Here's a video with a hombrew kit:
Doing this would get you out of virtually any EAS situation that did not arise through a popped strut.