If measuring your trips in 'weeks' - I wouldn't expect any issue with the chassis (truck) battery - assuming a good battery and no load.
If your unit has a chassis disconnect (as my 2000 Infinity did) - I also used the disconnect when parked to insure no load.
My 2014 Hurricane no longer comes with that switch..
dstankov - I've never seen an answer beyond 'it depends on model' as to whether the chassis battery is charged by coach.. I tend to suspect mine is - as I inadvertently used a 12v chassis socket for quite some time on our first trip - and when I discovered it was chassis powered - checked the battery voltage - and all were fine.
My searching never found a definitive answer.
I carry a charger with me - but only used it when an electrical problem prevented proper charging of the chassis battery when DRIVING (on the 2000.) A whole different issue as I limped home from that trip...
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