When I bought our 30.5BHLT I went to look at the FBHS. We saw the FBHS first, then went into the BHLT and the difference is amazing. To answer your question. I have put 4 bikes in the back and I much prefer that since they are far safer. I simply use large moving blankets and they stay quite comfortable. The BHLT has a lot of advantages, most notably it's a 50A service, and you can easily run both A/C's if so equipped.
I have 3 kids and they all love the loft. Check out the video's on YouTube for the BHLT, but for my needs I far preferred it over the FBHS.
I too, pull with an '03 PSD and it's effortless.