I've moved a 6 foot xmas tree in my BRZ before... May have been a little less than 6ft, but it was definitely taller than me and I'm 5'10.
And as for scratches, invest in some moving blankets to wrap the ladder in. I used that for the xmas tree and my exhaust, my interior looks fine. The only scratch I have is when a shop loaded my old wheels into the back seat for me. Guess they thought they were doing me a favor but now I have a small scuff on the rear interior side panel
