I once had a 4x8 tear drop. I come to find it to be a little cramped for 2 people when sleeping. We would load up to go wheeling and camping, every time, the TD was packed, we couldn't use the bedding. You place your stuff on the bedding. When you setup camp, it isn't too bad. But when you break down, you may do this in the morning with the dew. So you have to wipe down before storing or have a wet bed which you have to air dry at home or before you next destination.
If you are having the TD mod'd, why not look at having it placed on a raised platform. The platform, ofter referred to as a basement if there was a trap door to it from the inside, would hold your other camping gear. You can keep your personals inside on the bedding, or provide a way of hanging then inside. The basement would hold your tables, chairs, awnings, kitchen equipment, cooler, etc.
If you are looking at the Little Guy, there really isn't a separate kitchen with a bulkhead between the interior. The kitchen consists of a counter top and couple of cabinets. This is basically what I had. There really isn't much room to store the cooking and cleaning equipment, let alone a cooler for your food and drink.
Think of the TD as a Adventure trailer. The bedding is separate and remains separate from the storage requirement of your camping equipment. Do the same with the sleeping area being rigid like that of the TD. You'll need places to store your camping equipement.