The remote I use will work all the way around about 80% of houses I do. For places where I know it won't, either it doesn't matter as I'm going straight from window to the next, etc, or I just kink the hose and use the pressure switch on the pump.
Some places it easier and quicker just to use the trolley as I can have it set up in under a minute because I made it myself to work customised to just how I wanted it to be used.
I have two receivers worked by one fob. One receiver is on the roof of the van and the other is on the trolley system which is never far away when used.