When I camp, I sleep in my tent. Everything else is done outside
My concern with big tents isn't the size on the bike but the hassle setting them up and packing back up every day.
I suppose if I used it as a base camp, it might be different.
Remember that if you go with a big tent and don't stake it down, it might not be there when you come back
I've watched a few fly away in heavy winds. Even when they don't fly away, they tend to get damaged poles in high wind.
at 6'2 and ~300lbs, I fit well in a "2 man" but nobody else but my 3 year old daughter can join me.