It's real hard to give you good suggestions on your questions, since we don't know the overall condition of your bike, how long you've been riding, what your experience level is, or how much professional level riding instruction you've had (or not).
I can say with full certainty that long trips do not really stress the bike any more than a ride across town--provided the bike and the tires are in fact in good condition.
Is it unwise to go on a trip alone? That depends on many factors--the condition of the bike, how well you can find your way around (with or without maps or a gps), your riding skill level, etc.
You can sign up for bike towing services thru AMA, or the ROK group (R
awasaki)--last I heard. If your bike breaks down on you, and you have reliable cellular service at the location of the breakdown, you can call for a truck to pick you up. Don't expect said truck to show up in 5 to 10 minutes, though!
How much mileage/experience one should have b4 going on a longer ride of course varies from individual to individual, and (again) the decision to do this relies on a number of factors. Will you have a real chance to make such a trip later if you don't go now? And so forth.
For me, I had at least 4-5 thousand miles of riding under my belt, b4 I went to north GA, took the "experienced" level MSF course in Marietta, GA, and then rode the north GA mountains above Atlanta. I had a safe trip the entire time (even coping with Atlanta metro area traffic--no kidding), and was glad I did it. But the main objective of the trip was really the advanced MSF course just mentioned--the north GA ride was the trip's "gravy". Note also that I would not have considered such a trip (especially one that included parts of metro Atlanta) if I had not built up some riding time previously in less challenging places, and also...I had already taken the beginner MSF course a while b4 all that (and passed it).
What should you check on your bike b4 such a trip? Well, (again) that depends on the condition of your bike. As a bare minimum, if your bike is what you've indicated earlier, I would check the condition of the tires, the brakes, the cables for the brakes/throttle/shifter (not frayed and well lubed), VERY IMPORTANT: the lube and condition of the driveshaft splines, the battery (via a load test--at Autozone, Pep Boys, etc), the battery terminals (clean and tight), and the output/condition of the bike's electrical system (there are other threads here on this forum that explain how to do this). Make sure all major electrical connections are clean and snug--lube them with dielectric grease. Take along a tire repair kit (for tubeless tires) and a portable compressor pump to put air back in a flat tire. If your bike does not have a windshield, get one b4 a long trip--or you'll wish you had. Be sure to take good rain gear. Riding without rain gear in wet conditions sucks. But with good raingear, it's actually fun (really). Get at least some throw-over saddlebags for your bike, that are water resistant, or come with rain covers. Myself and others here ride with luggage that also serves as a backrest--a real comfort bonus on longer rides!
B4 going on a longer trip, it's also a wise idea to get a Clymer repair manual for your bike, and read thru at least parts of it, to familiarize yourself with the bike, and its inner workings--and how to repair different parts of it if things do go wrong. If you have questions about something you read there, ask them here--that's what bike forums are for! There are good people here with good wrenching experience, who will be glad to help you with your questions.
Also, if you have any doubts about your riding skills and experience level being up to the task, hold off on such a trip until you feel confident you can do so.
Instead, take an MSF course (if you haven't already). Nothing else out there will do more to boost your confidence level, if you are a new(er) rider. For the MSF course nearest you, visit:
BTW: Welcome (belated) to the forum!....
This is a great place to learn more about your bike, and riding in general....