I am considering 3 models of the caliber edition travel trailer from North Trail.I am looking for any tips on them as far as problems and good points. Also, is an island with a sink better than having a full kitchen? Is there more storage? The models I am looking at are the NT 29 LRSS, the NT 30 RKDD and the NT 32 RTLS. I am looking for a four season unit with enclosed underbelly. Thanks for any help you can give.