My 1973 blazer used to have a FourWheel pop-up camper for over 20 years, I bought it that way in 1988. I took it off last year and am beginning a rebuild project without it. The camper served it's purpose well, however going hunting and off roading was hell on it and the truck because of all of the vibrations and g-forces at different angles while driving on rough roads and such. It also put alot of stress on the bed from all of the weight transfer from rolling side to side around turns. After I took it off, I saw that the stress had actually cracked a tailgate post weld to the bed, so now my talegate rattles quite a bit and I need to get that fixed. The original hard top was a one piece and had to be cut to match up with the camper, and the rubber seal would tend to take a lot of abuse from all of the bouncing and would occasionally work its way out of the top in the middle, which let in the rain when driving on the highway- it may be better with a half top model blazer. Performance-wise, obviously you will burn more fuel with the extra weight and loss of aerodynamic efficiency, but the main thing is that that you have to account for the weight transfer when turning. It gets a little tricky at highway speeds and high winds with the blazer's short wheel base. The wind will naturally want to lift up the camper especially if you have a bed over the cab (which would sometimes work the rubber seal out) and will throw you around a bit, I've had some close calls overcorrecting. You will lose almost all of your visibility, leaving a small slit of rear view if your back door has a window, so I reccomend to get a set of good mirrors. I've almost been in several accidents because I just didn't see people along side of me riding in the huge blind spots. But I will say that I had a lot of fun in it; I always had a place to sleep if I needed. If I had too much to drink, I would just crash out for the night and go home in the morning! I could pack up and go anywhere without having to worry about finding a place to stay. It had quite a bit of storage space and could sleep 3 comfortably (4 was a little tight). I shot my first deer sitting in the back door. Never had to worry about bears or anything like that. I have stock suspension with 30" tires and I didn't have to worry about clearance in parkining garages (it was a little tight). I bought a spare tire carrier for the front that attached to the radiator support and the bumper. It was a good little set-up, especially with a boat. The only thing that I wished I would have done years ago was to have installed humbuckles to secure it to the frame instead of just bolting it to the bed. I believe that it would have mitigated alot of the effects that external forces imposed on it, therefore preserving the structural integrity of the camper and the truck. I also would have treated the bed first because all of the moisture held in by the carpet promoted rust on the bed. I should have installed stiffer rear suspension to handle the load. I had a good experience with the camper, but like anything else it has its drawbacks and requires maintanence.