So here's some more online advice to further muddy the waters…
Read your owner's manual for use of overdrive when towing. It'll probably tell you to tow with OD off all the time, but check to be sure.
Keeping maximum speeds between 55-60 is good conservative advice. The sky won't fall
if you're a little over, but you're asking your Element to do a lot. Air resistance increases as the square of speed, so twice as fast means four times the wind drag. In addition, the faster you go, the more vulnerable you are to fishtailing and loss of control, the more time it takes to stop. And so on...
Keep RPMs up when climbing (and descending) hills. 3500-4500 RPMs is no sweat for a Honda four-banger (we've owned two CR-Vs), but not for too long or in extreme temperatures. The transmission is the weak link. An external ATF cooler would help.
Do you have working trailer brakes
and a brake controller?
But you really need to start planning now to upgrade your tow vehicle
. Towing with a marginal or under-rated vehicle makes it that much more stressful (which isn't why you have a camper!) and exposes you to liability if something were to go wrong resulting in injury or property damage.
I learned that lesson the hard way. My first tow vehicle was rated for 2000 pounds and my Scamp was less than that. On our very first trip I overheated the transmission climbing a long grade in triple-digit temperatures against a stiff headwind. Thankfully, electronic sensors caught the overheating condition and sent the vehicle into limp mode before catastrophic damage occurred. But waiting on the side of a busy interstate in scorching heat with no AC while things cooled down was not fun! Lesson learned. We have a 3500/350 rated Pilot now.