"...How do you guys and gals deal...?"
didnt read 2 far beyond that.
Glad U have aservice that does the undercarriage in winter (then U stop'n go back to home washes).
I made upa 'carriage' that I can use to "do under" as I live in the Nor'east. Sat is chore day & the 'under car'
is just one-of-many. Doing wheel wells @ same time duz not require my "skate board ona stick/multi-jet garden hose"
(not what I made but apt description) but justa blast froma hand held pressure hose. This is the only 'washing' I do yr round.