21LH
Your filter will need to be changed before you fill again, and as long as no moisture inside the system( as Tank and pipes will make moisture from the temp change of atmosphere) the pump should be oK , but there is a strainer on most bowser tank pumps ( in fact all tanks have one) that will need to be checked and cleaned, also just do a rudimentry check of all fuel pipe connections not forgetting your rubber hose and what condition that is in, as well as the hand op shut off.
Peter R-B