I run a Mega-light, tyvek or pu poly mat for the sleeping area, Neo-air pad, Ti goat bivey, L.L. Bean 30° bag, and Sea to Summit reactor liner.
I bring the carbon fiber pole for the Mega-light so I can leave the tent up and still use my trekking poles.
With this setup I can go from mid summer scouting to late september freezing at night just by picking and choosing what parts of the system I use.
At most I will sleep in my longhandles on the nights in the 20's.
I have a Oware cuben fiber cat tarp I can take if going fast, light, and solo in the summer and shave a few pounds on the shelter weight. Sometimes I hunt with the tarp, bivey, and bag in my day pack in case I decide to spike out or get caught in a bad way. All 3 run right about 3 pounds. If I plan on spiking out I toss in the Neo-air also.
Tarping it, or going floorless isnt as bad as it sounds unless stuff is soaked when you arrive. Makes for a damp floor. Also if you pitch on a snow bank, the sleeping pad is paramount. Cutting some fir boughs to lay down helps also.