You have some options.
TrailManors, like all RVs, have a number of small parasitic loads (electricity users) that are permanently connected. In 7-10 days, these loads will cause significant (but not fatal) discharge of your battery. This depends, of course, on the size of your battery and its initial charge state, and it assumes that all the switchable loads - lights, appliances, etc - are turned off. So your first option: if you are going to leave the TM sitting for only a couple days, don't worry about it.
Second option is to disconnect the battery. This is easily done by pulling the main fuse in the battery positive wire. This wire will be either red or black, and the fuse will be located less than a foot from the battery's positive (+) post. With this fuse pulled, the parasitic loads are completely disconnected, and the TM can sit for a month or more without ill effect. A fancy way of doing this, and more convenient in the long run, is to install a battery cutoff switch in the positive (+) wire from the battery. I did it on my previous TM, and liked it a lot.
https://www.trailmanorowners.com/for...off#post121160
Third option is to leave your battery connected, and get a "battery maintainer" (not the same as a trickle charger) and connect it to your battery. A battery maintainer is a small but smart battery charger that monitors the battery voltage, provides enough charge current to make up for those parasitic loads, and stops charging when no charge is needed. There are a number of good battery maintainers, and if you search this forum for the word "maintainer", you will find a lot of discussion. My personal favorite is called Battery Tender (sometimes spelled Battery Tenda), and the model is called Junior, which can supply 0.75 amps of charge current. You don't need more than this. However, there are a number of other good maintainers, so you have choices. With a maintainer connected, you can leave your battery forever. No worries about forgetting to turn it on or off.
Bill