At 70 ambient, pressure should be low side 35-40 and high side 145-160psi. IMO possible blockage in expansion/orfice, which should be replaced as well as the drier anytime the system is open.
Lot of good ideas of stuff to take, i saw shovel mentioned, but we got a rake, axe and a fireplace poker in our motorhome also. Always got a list of stuff to gather up for next time.