Cut two 1 and 1/2-foot diameter logs 8 feet long with a chainsaw. Cut two 1 and 1/2-foot diameter logs 5 feet long, and cut two 1-foot diameter logs 3 feet long. The 8-foot logs become the seats and table top. The 5-foot logs are the tables base. The 3 foot log serves as a spacer between the base and the tabletop.
Use the chainsaw to split the 8-foot logs in half. Once split, you'll have four half-logs with a flat surface and circular surface. Two half-logs form the table top and the other two become the benches.
Cut a V-shaped notch 1 foot away from each end of the 8-foot half-logs. Cut it into the round side. Test the notch over the top of the spacer. You want the notch to sit over the spacer. If it doesn't nest, then cut the notch slightly larger.
Center a spacer log on a base log. Have a partner hold the log in place while you drill two holes into the spacer. Drill each hole 9 inches away from the end of the spacer. The holes should extend 9 inches into the base log. Repeat for the other spacer and base.
Hammer rebar through the holes in the spacer log and into the holes in the base log.
Place the notch of the 8-foot tabletop logs on the top of the spacer logs. The base and the spacer act as the table's legs. Drill holes through the tabletop into the spacer logs. Avoid hitting the rebar you hammered into the spacer and the base. Hammer rebar through the tabletop into the spacer. The table is now linked together.
Add seats by placing the notches of the bench logs on each side of the base logs. Adjust the bench either closer to the table or further away as desired. When satisfied, drill a hole through the bench into the base log. Hammer in rebar to secure the bench to the base log.