Since it appears money is a consideration, to consider a pop-up or travel trailer you should already have vehicle such as a pick up truck/suv or vehicle with a tow package ( 2 hitch, 4 pin/7pinn wiring harness/ transmission cooler/ rear differential 3.83 or 4.10) If you would need to purchase a TV than I think that option is out
Used pop-ups can be bought for a $2-3K and go up from there. Selecting a pop-up/TT is a function of budget and personal wants/needs trade offs (A/C, Refridge, Toilet/shower, # of sleeping spots
.)
Camper Sample Budget
TV Owned Hitch already installed
$100 - $800 Misc tow parts Mirrors, tire blocks, brake controller large camper dependent, hitch, sway bar,
$4,000 Pop-up
$500-1,000 Camper stuff. Pots pans, linens, dishes, small repair/replacements
Garage sales are great places and can greatly reduce cost
$200 Camper insurance Ball Park, mine is $350 for a hybrid Yearly
$350 Storage - mine is at a secured lot, if you can keep your camper at home delete cost - Yearly
$100 - $500 Gas depending on camper, gas mileage will be reduced, keep in mind distance traveled as well Yearly my suburban goes from 16mpg to 10mpg towing
$200 Camper/TV Maintenance repack wheel bearing /Transmission flush (yearly or every other year) depending on mileage driven.- Yearly
Approximate cost $6-7K There A LOT of variables in this equation.
Tent Sample Budget
$150 Car Topper(optional depending on TV)
$200 Tent upper end I bought one from Costco, $100 it is not rain proof!!!
$500-1,000 Camping stuff. Pots pans, sleeping bags, stove, dishes, chairs, several Large plastic containers to put stuff in, lantern, chairs, fan, extension cord
Garage sales are great places and can greatly reduce cost
Approximate cost $400 to $1500 - There A LOT of variables in this equation.
Another option is renting the equipment, either the camper and tenting equipment (at REI).
In regards to staying at the fort, as long as you can afford and have vacation time. First time was 8 nights and this was to short, last trip was Halloween 12 nights, about right, we were 8 days in the parks. Next trip is planned for 10 nights, 5-6 park days.