My first tour of 1000 miles my bike and gear weighed about 50 lbs with half of that weight being my gear. Not a problem on flat terrain but not ideal when going up long uphill grades. My second tour was with my kit reduced to 15 lbs in total.
It helps if there are two people as they can share the weight of a ground cloth or camp stove and pot and fuel bottle and bike repair tools. On the first trip my buddy and I took a tent but it turned out to be a complete waste as we did not want to take the time to set it up in the dark and we did not want to lose time hitting the road the next day. Not using a tent made us less conspicuous when spending the night on private lands or in a cemetary.
We started using only a ground cloth. If morning dew put moisture on our down sleeping bags we would let them dry out in the sun on our lunch stop or if going through a town we would look for a laundromat and put our bags in one of the large dryers.