I'm in Southern Baja (Mexico) and am about 100 miles from a place where I can either buy or use a torque wrench. The shocks are installed. Is it better if the nuts are too loose (within reason) or too tight while I'm driving the X to where I can buy a wrench?
Don't leave the nuts loose. Tighten them up, but don't over-tighten by putting all your strength into it. Use your best judgement.
I have to ask.....
Why did you decide to take on a repair project so far from any place to buy things?
Anything can happen during a repair. Your wrench could break... other things could break ... all requiring a trip to a store.