Not to talk you out of buying a camper but if you plan on pulling a trailer anyway is there a reason you are not considering a toy hauler? Your truck may handle one of the smaller campers without much issue but the combination of a camper and trailer is probably going to be a bit much without mods. In contrast, you probably wouldn't have much to do to tow a small toy hauler plus you will likely get more interior space if that counts for anything.
That being said, if your heart is set on a camper go to an RV show and walk through the different models there. I learned a lot doing this and though I never did buy from any of the manufacturers present at the show I went to, it did help me to better understand the quality levels of one brand over another and helped me to better pick my preferred layout.
One last thought, slides are nice and have lots of space but with that comes complexity, additional maintenance and another area of water intrusion. If your only gong to be on the road a few weeks out of the year then it may be worth it but if you are going to be on the road all the time then a simple hard sided camper is practical and gets the job done without the fore mentioned issues.