Never had a problem with the honeywagon. If there's no charge for your honeywagon service, you're doing better than I am. I camp at horse show grounds where there is no dump, but Mr. Honeywagon comes calling each day. Our honeywagon man pumps us out for $30.00. (about 30 gal of grey and 20 gal black from me if I need it.)
For me, Mr. Honeywagon costs less than taking the detour to the $55.00 dump site on the ride home. I've never had a problem, and my Sunline is all original and aging (1985).
I am curious, though. What is bad about using a honeywagon? I have had this current camper for a year now with no trouble, but the previous owner had it since 2007 and had only used the honeywagon at the same campground with no trouble at all. I would like to know the pro and con of the honeywagon.