Make sure any of the Budget Rental places you spoke to weren't the Gentry way address. There are at least 3 Budget Rentals in Reno and 2 might be hostile, but based on the second thread I linked Gentry Way was still renting as of March. Being nicely dressed (and British, haha--we're such suckers) is a big plus. Having a sealed plastic bag with clean clothes to return
the truck with at the end of the week is also recommended.
Get all fees or top limits of penalties in writing.
Some make a good faith effort to clean the truck--and say "don't use water on the inside, you'll make mud"--though I don't know whether this means use only a broom & swiffer & vinegar-dampened cloths . . . or what. I also have no clue as to tracking devices.
Here are some other interesting threads:Avoid Budget Rental Car at the Reno Airport!viewtopic.php?t=32414Box truck camping tips..viewtopic.php?t=35289Weeklong truck rentalsviewtopic.php?t=39415