I'm not sure what conditions you'll be using the tent in, midges or whatnot. One of my friends is slightly taller than you. He has a tunnel type tent with porch. He sleeps with his feet sticking out into the porch area and uses a gound cloth there. I realise this might be what you already do, and also that it might not be a desirable option. However the only tent he's ever found he's been able to fit into was a four man tent with him on the diagonal by himself. Cheers.
Is this another how many thread? Ok I'll go first:
Large poo catching string pants x 3. These were inherited from grandpa. They have the generous poo catching shape, though their stringiness detracts from the safety. Think crop sprayer and you're almost there.
Speedos x 2. Go to multi-purpose wet or dry undergarment. Can be worn as hat if necessary. Orange colour for survival value, though danger of being mistaken for a bowl of tangerines.
Long Johns x 2. Winter weight. Can do duty as PJs. Also, when paired with any of the above allow entry to fancy dress parties.