The truck comes down to math and personal decisions. Are you the type who feels the need to be within all of your truck's ratings? Or, are you the type who will pick and choose which ratings they're going to adhere to? Or, are you the type who would rather not know?
If you're a) or even b) (as b- is hopefully making an educated decision to overload one or more ratings) - you're in the perfect position to load up the truck and now camper and hit a scale. You'll want 2 sets of weights- one set while hitched up and a second set of just the truck. You should get weights for the trucks front and rear axles separately as well as the camper's axles (can be combined) for each set of weightings. CAT Scales (at truck stops) make it really easy to get each axles' weight. Just a little more truck jockeying if you go to somewhere with just a single scale.
Load up like a normal trip and include all usual passengers. Do both sets of weights at one time. At a CAT Scale, it's a 10-15 minute operation and only costs $12 (assuming $10 for the first weigh and $2 for the second which is pretty normal).
Then, do the math. Where are you against your ratings?
Personally, I'm in the stay within all ratings camp- but I understand the other side a bit more from discussions here on FRF. Still not for me, though.