About to buy our first RV

Some good advice above. If you have not yet committed to this 19 foot Class C, you might want to consider my advice. A 26-27 foot Class C can have a rear bedroom with RV queen sized bed and some clothing storage room, To get a bed with access on two sides you need a 30 foot class C. The overhead bed is OK for kids but not great for adults, hard to get out of bed, down ladder, go to john in the dark and get back in bed without waking sleeping partner, hard to do with feet or knee problems. Short rigs have very limited cabinet and rear storage space and little elbow room. Slides are nice but can have problems extending and retracting, water leaks, in the way while on the road, etc. You don't "need" to tow a car with a 27 footer. It takes a few minutes to disconnect and run into town, etc. You can rent a small car to tour Boston or other RV unfriendly cities. Driving a 27 footer is not much different than a 19 footer, don't be intimidated. All Class C's are about same width and height.
Most Class C's have house batteries and fresh water tanks that will sustain you for up to three days without hookups and without running the furnace. Microwaves and air conditioning require 110volt AC camp power. Best to have full hookups at an RV camp. Connect sewer hose and dump waste water when ready to leave, (Must have water in tanks to drain waste properly).