The National Rally you will really enjoy. Take advantage of the presentations. Walk the grounds and look at the various work the MOC members have done to their RVs. And be open to new ideas. I have found other MOC Members knowledgeable, friendly and willing to share. So, there will be plenty of opportunities to learn!
Glen M is correct, you will need to have at least 40" of hoses to hook-up to the sewer, water, and power. I have double the hoses, an extension cord for the power and then two sewer lines.
May I suggest that you set-up appointments NOW for the work you know you would like to have done AFTER the Rally. There are people that travel from across the United States to attend this Rally; and have work performed on their RVs while they are in Indiana. At Rally time, the vendors get very busy and they may, or may not, be able to accommodate you on your timeline.
I suggested you have the jobs scheduled for after the Rally, so you can visit with the vendors and MOC members to see the various fixes or tricks they employed on their rigs. Undecided, then wait if there is no urgency to have the repair made. After our first Rally we decide on what work we wanted done on the RV, and we started to make our reservations for the work to be performed a year out. We could not be happier!
Here are some vendors and a few thoughts about the services they provide:
#1 - MoRyde is usually there for suspension, entry stairs, trays and hitch sales. I have MoRyde suspension and hitch which I use and really enjoy.
#2 - Future Solutions Inc. (FSI) is usually there. They handle solar upgrades and solutions, DC to DC Charging solutions, and other electrical matters such as cooling fans for inverters. I used FSI while I was there and they were excellent too!
#3 - Dave from Custom RV Furniture Service in Melford is usually on the grounds working on someone's RV. He is an excellent cabinet maker and can provide just about any solution to a cabinet problem or build almost anything you desire.
FSI and Custom RV Furniture have spots for Boondocking, just ask.
I invite other members of the MOC to chime in on vendors that they have used before, during or after the Rally!
Cheers