This way you won't loose them. That can happen pretty quickly otherwise. A track pump will let you set your exact riding pressure every time, therefore saving you a fortune in pinch punctured tubes. Anyway I managed to find one for 15 with an alloy barrel that works a treat. I prefer 45 PSI both ends for the rocky trails we ride.
Track pumps are well worth it.
I have a flexible nylon board I put up behind the chain when I use spray lubes. Then I peddle the bike backwards slowly and blast the grit out of the chain with GT85. This gets loads of grit out even after using a chain cleaning machine. See the piece on tyre repair on this site at Mend a torn MTB tyre . Carry one at all times.