We have whatever hose came with the RV. We typically use the holding tank and empty when it nears full. If the hose does not reach to the camp space pipe, we drive to another site to empty.
I recently purchased a macerator - it got hot and shut off five times during the dump process - not a big issue for us since we will use it mostly at home after we return. Might be an issue if you have a line waiting behind you at the dump station. I am actually pretty indifferent about the big hose vs. macerator - at home we have a 75-foot run and a 1.5 foot rise to the dump fixture, so the macerator is necessary.
We use a formaldehyde-free black water treatment so we can dump into our septic system at home. We do not treat the "drinking" water, but we don't drink it either. Next round, I will likely dump the grey water on our trees.
Many cars cannot be towed 4-down without modification. We have a 2001 Toyota Echo manual transmission which can. We have towed it about 60K miles in addition to its 120K driven miles. It is the best car I have ever owned. NO engine repairs, no transmission repairs, all original accessories, belts and hoses. Some guy on youtube has over 400K on his.
Good luck!
Matt B