Yeh good start, I'm doing the exact same with ride height myself as the mrs is due in January and want to five myself as much clearance as possible! Maybe Waxoyl your underchassis if you get the chance.
I also carry a holdall with spares, little shovel/mats/bit carpet, some clothing, small sleeping bag, wind up torch and so on. People may mock but a few years back I nearly had to sleep on the A74M as the weather was horrendous and traffic got stuck.