I'm looking at a few different 2-man flip shelters. Do the seats in the Clam Nanook XL Thermal move side-to-side? I'd like to be able to remove a seat & move the other to the middle when I'm fishing by myself. I'm looking at the Clam Yukon as well - it has more interior height & I know that the seats move side-to-side. However, the Yukon is also $200-$300 more than the Nanook. Any help is appreciated. Thanks!