I put a bayonet connector on the top lid of my septic system (collars and lids, so they don't have to be dug up for a pump out). Final trip dump and final winterizing dump can be done at home. Be advised, there's reinforcing wire in the concrete cap (went through 8 or 9 cement drill bits to get through). You could get extra hose and just have it at home for that "home dump", not carry it around all the time.
Be sure to dump your tanks after you winterize! My sister and bil omitted this step once. Took a trip south in the dead of winter. Got there and the tanks were both cracked. The big slabs of ice in the tanks got bounced so hard they shattered the plastic. Expensive repair, all that was salvaged was the end cap.
Any hole made in the septic lid that can accomodate your dump hose will do. I only went with the bayonet type because it has a nice, secure cap.
Ralph