Wife and I just upgraded from our 1996 camplite pop up to a 2012 JAY FLIGHT 184 BHS.
Excited about making camp setup easier, I think my son who is 4 is more excited about the bunk bed :-)
The wife is already thinking about mods on the inside of the trailer (Got the itch with the pop up a few years ago)
About the only mods I plan on doing to the outside of the trailers is taking the scissor jacks that I installed on my pop up and putting at least two of them on the front of the trailer. The other mod I would like to do, but wondering if any else has done this or has pictures is I would like to add another propane tank on the tongue, I don't necessarily want to have both of them hooked up, more of a place to carry a second one so I can remove it to use my weber grill when camping or if need be in the middle of night when I run out of propane I can easily swamp the hose to the other tank.