I think people missed your link so here it is in a slightly easier to follow format.
LinkThat trailer has 30 amp service and it definitely has a furnace so you will not freeze. But there's a catch. If you camp where there is no electrical hookup you will drain the trailer battery overnight or within two nights running the furnace. If the battery dies the fan on the furnace dies and the heater stops working, and you freeze.
๐ Sorry I live in southern California and I also think that 50 is cold.
If you are getting camsites with electrical hookups they you may want to pick up a small electric heater at Walmart. This will allow you to keep the trailer warm without burning through all the propane.
Now for some unsolicited advice.
Many people believe the trailer battery will be charged appreciably by the truck when you are towing it around. This is not true. You will need to plug the trailer electrical cord into a power source (electrical hookup at campsite) to charge the battery.
Your truck will need an electric brake controller installed or the trailer brakes will not work. You can ask if a controller comes with the rental, but I'm betting not.
You can get a brake controller installed at many RV dealers, some u-hauls, camping world, or by doing it yourself. I like the Tekonsha Prodigy line of brake controllers but they cost around $125 before installation.
linkTrailer tires have a maximum speed rating of 65 mph.
If you are not plugged into an electric source the microwave and all the household style electrical plugs will not work. But, the heater, water heater, and water pump will still work off the battery.
Ask what type of hitch you will need for your truck to pull this trailer and do they provide the hitch if needed.
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2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup