Min. black tank for 7 day Boondock?
We have a short list of sub 28' "couples" trailers that we are considering. Some have black tanks as small as 25 gal. What is a min. tank size, for a couple, that would allow us to boondock at least...
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Unless you have explosive diarrhea a 25 gal black will be fine for 7 days. Even though we have a 40 gal black we could easily get by on 25. The nice thing about a larger black tank is it allows us to dump some grey sink water down it so our 40 gal grey won't fill as fast.
