When that time arrives, I will develop the BOOZEBLIMP which specializes in mobile potato farming, fermenting, luxury lounging, and casual floating travel. I'll be a heft 5x5 or 7x7 platform, maybe 5x7, with open outdoor lounging, farming, solar fermenting, and a heavily armored mini-house to hide from the rain and zombies. Softly floats from one survivor camp to another selling bootleg vodka.
Also, had a few thoughts on flight.
Every aerial item would provide a 'lift' stat, a helium balloon might provide 1, a zeppelin frame might give 10, an antigravity sphere 20... and wings would give something like 5.
1: Lighter-than-air would be simple. If lift > weight -> allow raising.
2: Powered flight would depend on speed. (Speed/10) * wing_lift = lift. So if you're traveling at 20mph, and you have 2 wings that are rated at 5 each, then you get (20/10)*5 twice, totaling 10 per wing, so 20 total lift. If your weight is less than 20, then you're able to control your ascent.
If you have air-capable thrust (ie: not tires) then you can maintain your speed. If you do not, then you lose speed over time. If you have ascent control (ie: your wings have control surfaces) then you can raise altitude at the cost of speed, or lower altitude and gain speed. You should also be able to angle the wings down to keep from lifting off, to a certain speed, by keeping the flaps raised. When you've picked up some speed (by your motorcycle tires) then you can drop the flaps and let the wings lift you - immediately beginning to lose speed because you no longer have wheels on the ground but you should have built up sufficient speed to carry you a distance.
The effect is that you should be able to slap wings on a bike, keep the wings angled 'down' as you pick up speed, then flip the wings 'up' and use your momentum to glide across a river, thicket of forest, zombie horde, etc.
This should ideally stack with LTA items. Having a balloon would mean you don't need to go as quickly to lift off, so very large vehicles could utilize Wings and LTA to combine lift values and make powered flight somewhat easier.