Hey fellas I'm new so go easy on me!

My question is this; I just bought a 2010 F150 FX4 and had a Daystar 2 1/2 in Lev kit put on last week and am really happy with the look but I think I kinda want just a HAIR bigger, any ideas? I want the back end to be a little heavier duty for my travel trailer; so maybe a leaf spring?

What about the front end I want it levelled so to speak but want to feel comfortable in the back as well as I also want to get a little more over all height.

BTW on Monday I'm getting 295/55/20 Nitto Tera Grapplers with XD Series Monster 20's

 

i just talked to 4 wheel parts 2 days ago. they said with rbp 94r 18" the biggest tier i could go was 275 something i forget that was with a 2 in leveling the guy said it was about a 33 in tire