I too have a few Ritter cameras....8x10 and 7x17. 99% of my 7x17 use is within 100 yards of the car. I have purchased a jogging stroller with the intention of taking the 7x17 to the James River here in Richmond. The parking is a short ways from the areas I want to photograph so I figure the stroller will do the trick. John Powers is a 7x17 guy and somewhere on this forum he has posted some instructions on how he modified his jogging stroller to suit his 7x17 needs. Iuse a Ries J100-8 to support my Ritter Cameras (I'm 6'6") and use the Ries Junior head. Works like a charm. Sorry, but I have absolutely zero experience with the arca heads.
Good luck and welcome to the club!