Aristo Craft makes a DC walk around throttle. One controller can be switched between two receivers. You can also send them (hand set with receiver) in to Aristo Craft to have them set to other frequencies in the event you want to run more than just two of them. Your layout has to be set up with power blocks and manually operated block selectors.
Way back, before DCC, I had the D&J Railroad setup to operate with 4 Aristo Craft Throttles. It worked quite well and also included a sound system that could be operated from the handheld throttle.
When ya absolutely positively need model railroad fun, choose the D&J Railroad