Thetford shows a pretty good exploded view of the toilet at
http://www.thetford.com/pdf/12840.pdf - see Figure 2.
It looks like the toilet is bolted to the floor with just two bolts, accessible from under the seat. And the EZ slide is attached to the underside of the toilet with half a dozen screws. What is not clear is how the EZ slide is attached to the plumbing beneath the floor. It appears that it is like a house toilet - a press fit into a large gasket or O-ring.
There is more good info, including disassembly diagrams, at
http://www.thetford.com/permanent_el...gicservice.cfm
I can only suggest that you build a dam of towels around the toilet before you lift it.
When you have done the deed, how about posting the answers here? You can be our guinea pig!
Bill